I am new at Sonar and especially, Sonar X2a.  Due to obligations and etc, I have not been able to get comfortable with any of the Sonar products.  I previously used the Roland 2480 and enjoyed that.  I upgraded to the Cakewalk V-Studio 700C and R with Sonar 8.  In theory, these things will enable me to do much better work.  Now that I am in a point in my life I have and will have much more time devoted to this hobby so I figured I might as well "start" with the latest version of Sonar.
 
I opened an project to experiment with Sonar.  In this project, I wanted to play with the Fantom soft synth.  I inserted a simple instrument track with Fantom.  I have a MIDI clip I made inserted into the track and when I hit "play", the VU meter responds but I am not getting any audio.  
 
I thought I would try another soft synth so I made a simple instrument track with Cakewalk TTS.  I copied the MIDI clip into the track and it plays correctly and I get the audio through the speakers.  
 
I don't know if I need some other driver to get it to work or not.  ????
 
My input setting:  Fantom VS700 MIDI Omni
Output setting:  Master
The Master output:  VS-700 Main (which works with other audio clips/tracks)
In the Inspector Pro Channel (MIDI tab), I've tried various MIDI channels to no avail.
Bank:  There are only two options, "Bank ----" and "0 Bank 0"
Patch: None (though, I've tried different patches and there isn't any audio)

I don't believe that the VST for the Fantom is an actual soft synth. I believe its a front end for the Fantom on the V700.  I may be wrong here though. What you may need to do is route the V700 audio out from the Fantom to Sonar. Think of it as a sound module. 
 
You may need to do some digging into the manual of the V700 to get how all this works. 

You do not have to route an audio output from the Fantom: it comes across the USB connection from the IO unit to your PC (Sonar).  It works exactly like a soft synth EXCEPT you can only have one instance open.  If you try to open a project using Fantom while another Fantom project is open, Sonar gets confused and locks up.  (Well, X1 does.  I don't know about 8.)
 
I wish I could help but I will tell you that it was a nightmare getting Fantom set up.  The directions are horribly confusing and you need to be sure not to install the ARX driver if you don't have ARX (expansion cards).  Also, Fantom only had 32-bit support at the time I installed it so I had to use bit bridge.
 
One thing to check is your Preferences to make sure it is listed as one of your devices.  Also, be sure to check the ins and outs on the MIDI and audio tracks for the Fantom.  Fantom has a tendency to screw those up.
 
I really like Fantom but was quite disappointed at how poorly it was implemented, although it is working fine now.
 
I had to have a tech from Sweetwater resolve the Fantom issues, so I am not sure I will be able to fix your problems, but I will be glad to offer what I know and also to look at my Preferences settings to see how they compare to yours.

"Fantom only had 32-bit support at the time I installed it so I had to use bit bridge"
 
Hmmm, what is a bit bridge?
 
"One thing to check is your Preferences to make sure it is listed as one of your devices. "
 
In my preferences under MIDI devices:  
Inputs:  FANTOM VS (VS-7000
Outputs:  FANTOM VS (VS-700)
 
(There are other things checked but these are the only options which contain the word "FANTOM".)
 
For the Simple Instrument Track for the FANTOM:
 
Input setting:  Fantom VS700 MIDI Omni
Output setting:  Master
In the Inspector Pro Channel (MIDI tab), I've tried various MIDI channels to no avail.
Bank:  There are only two options, "Bank ----" and "0 Bank 0"
Patch: None (though, I've tried different patches and there isn't any audio)
 
The Master output:  VS-700 Main (which works with other audio clips/tracks and it is how my monitors are hooked up).

BitBridge is software provided by Cakewalk. It runs automatically in the background loading 32bit VST plug-ins making them available for use in 64bit SONAR.

RA1222
"Fantom only had 32-bit support at the time I installed it so I had to use bit bridge"
 
Hmmm, what is a bit bridge?
 
"One thing to check is your Preferences to make sure it is listed as one of your devices. "
 
In my preferences under MIDI devices:  
Inputs:  FANTOM VS (VS-7000
Outputs:  FANTOM VS (VS-700)
 
(There are other things checked but these are the only options which contain the word "FANTOM".)
 
For the Simple Instrument Track for the FANTOM:
 
Input setting:  Fantom VS700 MIDI Omni
Output setting:  Master
In the Inspector Pro Channel (MIDI tab), I've tried various MIDI channels to no avail.
Bank:  There are only two options, "Bank ----" and "0 Bank 0"
Patch: None (though, I've tried different patches and there isn't any audio)
 
The Master output:  VS-700 Main (which works with other audio clips/tracks and it is how my monitors are hooked up).

 
Try using normal MIDI and audio tracks and not using a simple instrument track.  Have the MIDI track out to your Fantom and the audio track input be the V700 audio out. 

"Try using normal MIDI and audio tracks and not using a simple instrument track.  Have the MIDI track out to your Fantom and the audio track input be the V700 audio out. "
 
Tried that.  Still no audio.  The VU on the Fantom track is showing a signal but, for some reason, I can't seem to route the signal to an audio output.

What I'm getting at is that the soft synth is not a soft synth. It has noting in it that makes sound. All that is on the V700. The VST is really a patch library and editor.
 
What you need to do is trigger the sounds on the V700. That should work as any hardware sound module. When you have the V700 producing sound you then use an audio track to record it. 
 
 

I agree the sounds have to be routed through the VS-700 Console.  But, I can't figure out how to do that.  I've tried a zillion different routing options in both the Fantom track and the Audio Track to no avail.  
 
I inserted a Cakewalk TTS soft synth, which is (at least I thought it was) similar to the Fantom soft synth.  I was able to get the audio from the simple instrument track I created for it.
 
I sent Roland an email regarding this issue and am waiting a response.  I did an installer update yesterday which enabled me to get the Fantom as a soft synth (or at least it now shows in the soft synth drop down menu).  I also noticed in parentheses it says, "32-bit".  I don't know if this has anything to do with the problem or not.  When I updated the installer, which is supposed to be for the Fantom, I checked the 64 bit box as I was going through the process.  
 
Thank you

No you don't get it, there are no sounds in the control VST for the fantom. Its no different then any other sound module. You feed it MIDI and it produces sounds. The VST is only there to control it. Its a convenient way to work with patches. You still need to send MIDI to to the Fantom. Because you are using a simple instrument track you will need to bring the audio back from V700 into the audio part of that track. That means you will need to record.