hello every one , so I got the sonar platinum and I noticed if you record a track with a soft synth and the you go back and record a measure or 2 over the track that you've already recordered  , the audio of the track is muted ,
example track one I recorded a piano sound but I noticed a mistake so all I want is to delete the mistake ( on measure 12) so once the measure 12 is deleted I start recording from lets say measure 10 so that I can listen to the track so    then I know what to play on 12 , but here is the problem , the track does not play once the record button is pressed  just the metronome why??? thank you 

Are you working in a project that so far has only one track? Or is there music on another track? If you are punching in on the only track, of course you won't be able to hear the part you are trying to replace. If there are other tracks in the project and they disappear when you hit Record, then you have too many tracks armed.
 
Maybe turn on the metronome so you can keep time during the punch-in.

With Midi you would actually be better off to just open the Piano Roll View (PRV) and fix the notes using the smart tool.. You'll really want to learn how to do midi editing  as it make life grand! 
I'm no keyboard wiz so I just hack out my parts with wild abandon and go back and spend a month fixing it up... just kidding, I try and play my part as well as possible and then play trough the song with the PRV on full screen looking and listening for mistakes. I can even embelish my lame 3 finger chords and add more to them, 
 
My routine is to play the part through a few times until I've gotten as good as I'm going to get. Hit record. 
Then I save it.
I open the PRV and determine the note resolution buy changing the grid. Once I see the lowest resolution ,say 16th notes, I quantize to that amount. 
Now I run through the song scrutinizing the notes and adding and subtracting as I go. 
 
As far as auto punching in and out  goes when you set a punch point the old part is muted during the recording. 
In cases where you need guidance it is better to just insert a new midi track and play along with the original. Now you can just cut and paste to add the new part to the original. There is also the Comping feature which I don't use but some people like it. 
In preferences you'll fine "recording" and there are 3 options for re- recording.. Comping, Overwrite and sound on sound. 
 
The deault is Comping so I'll assume your using that. 
When you hit record at measure 10 it will be recording a new lane but I guess you won't hear the original. 
To hear the original up untill 12 you need to use auto punch in/out. 
You can enter punch in and out points using the tool you'll find up in the task bar. You just highlight from 12 to 14 using the timeline and only that will be recorded. 

I have so far 5 tracks ,the sound goes away to the one that I try to correct the other 4 are playing normally ,I guess i comparing with my old home studio 7 which I never had problem with it ,it should be easy, why this daw has this bug ,so I'm assuming that there is no solution am I right??

Cactus, I guess that's an option by recording to a new track and then paste it over but has i mentioned this is a problem that I did not have with home studio 7

I don't understand. When record over a section of a track, you want to be able to hear the old track while you're recording the fix-up? You could set SONAR to record sound-on-sound, but then the original -- bad -- portion of your track would not be erased. I think you'd better get used to it: when you punch in on a track, the original recorded material is not audible. This is not a bug. This is the way it's been for decades. If you need to hear it while you record a new track, just put your new recording on a separate track.

If I understand you right, you need to make sure input echo is on for that track and setup auto punch in/out points - in on measure 12 and out on measure 13 for example, and activate auto punch. Then when you hit record from measure 10 and start playing along, Sonar will start playback then automatically record your live input from measure 12 to measure 13 then drop back to playback again.

And has i mentioned I've used. Hs7 for years and was not like this one, BUT if this is platinum technique then I have to work with it
I also have some other issues with platinum,should I opens an other tread??
Thank you

No....if I set the record button on over a track that is already recorded with a soft synth that same track became mute while is on record mode and all other tracks are playing normally
Example track 2 is recorded with a piano sound for 15 measure Ok? So if for whatever reason I want to add couple extra notes on track 2 on top of the piano sound I,i then would just set the bar back to measure one and then hit the record button for the track 2 ,so I'm expecting for track 2 to play back to me while the metronome is on and record button is on for just track 2 ...but noooo....track 2 is not playing ,is just mute, how the heck wpuld I know where to put my new notes.....

tony2000
No....if I set the record button on over a track that is already recorded with a soft synth that same track became mute while is on record mode and all other tracks are playing normally
Example track 2 is recorded with a piano sound for 15 measure Ok? So if for whatever reason I want to add couple extra notes on track 2 on top of the piano sound I,i then would just set the bar back to measure one and then hit the record button for the track 2 ,so I'm expecting for track 2 to play back to me while the metronome is on and record button is on for just track 2 ...but noooo....track 2 is not playing ,is just mute, how the heck wpuld I know where to put my new notes.....

OK, I think I get it now. Set your record mode to "sound on sound." That will allow you to record on a track while hearing material previously recorded on that track. If you are recording MIDI, you don't even have to time your in and out points. Just start recording a little before the spot where you want to "add couple extra notes," and stop the transport when you're done. The new MIDI data will be stored in a take lane, and it will play back with the original MIDI data.
 
To set the mode to "sound on sound," you can press "P" on your computer keyboard to open the Preferences dialog, then go down to Project|Record|Recording Mode. You'll see three mode choices: Comping, Overwrite and Sound on Sound. Select Sound on Sound, then click OK. Now it should work the way you want it to.
 
Sound on sound is NOT the default mode, however, and you may find that you have to reset it back to that mode on every new project. When you want to "fix" a part you played by replacing it rather than adding to it, you'll need to switch back to one of the other modes. In your case, I suspect "Overwrite" would be the choice.
 
Good luck.