Trouble getting MIDI'S to a synth

computer and sound card specs? OS and version of MC? 

Windows XP Pro, MC6, EMU1616pci, Roland SD50, Realtec HD Audio. I had been able to drag and drop the MIDI tracks to a Sound Studio or Studio Inst. Synth with no problems, now it is like the MIDI is not responding in the synth track. For example, MIDI drum track to a studio instrument drum kit will sound the first note then nothing else, I double click the drum kit in the kit window and it will play, restart the track and nothing, or the synth will play partial notes, like maybe a third of what is in the MIDI. I have never had a problem with this before yesterday. Have I tried everything I can think of to fix this and I'm a little confused as to what has happened.

wow... you just reminded me of something.

When I first got into digital recording I bought an EMU card to use. What a freaking pain. It had patchmix with it and I literally had to call EMU every single time I set up a new project to have their support guys walk me through the patchmix setup...... 

I ended up yanking that EMU PCI card out and sold it cheap and fast on ebay and bought a different card that ended up being so much easier to use. The difference was like day and night. 

You might want to have a serious look at the EMU card and perhaps get something easier to use. I did, and never regretted losing that EMU. 

I do have audio now, using the ASIO driver, I have a session saved just for the MC6. I will see if the synths work shortly. It is a bit of a hassle to set up the EMU, but not to bad yet. So, do I have to do this with everything I do? That will not cut it. What other suggestions for a card would you all have? I'm glad there is an EMU wizard here, RobertB, you da man!! Thank you all for your help, be back soon, count on it.

Can you post a screenshot of your Patchmix?
if possible, a screen shot of your Audio Devices in MC6 would also be good.
Are you using the same input(s) you used for your guitar tracks?
MC6 will only allow two audio inputs(one stereo pair). Because of the way ASIO handles the audio signal, MC6 may not recognize the A and B inputs at the same time.

Ok, I need some opinions, Would I be better off with something like a Roland Quad-Capture Interface? What I am interested in doing is taking the MIDI's I use out live gigging, and turning them into CD's. I'm not a songwriter, I don't want to, or have the ability to, lay down multiple guitar tracks and what not. I just want to make the MIDI stuff I play sound good and lay down the vocals and the bass, with what guitar I can do. I need "keep it simple stupid" stuff. I had this working real good the way I had it, and now it's getting complicated. Help me boys!! I don't mean to be negative, I don't have the experience that you guy's do, and I'll be dead before I get even close. I have spent a lot of time picking my equipment and I think I have done pretty good. If I'm over my head with this EMU stuff then I need to go another direction. Tell me what you think.

So do you have a separate strip in Patchmix for every input of your interface? And in that strip you need
to insert a send to SONAR/Host. There must be an output strip, Wave out,  as well, but only one is needed (haven't played with it for a long time 'cause there's been no need to). Once you set it up you never need to go there again, unless for volume settings or such. Different sample rates/bit depths require their own sessions, IIRC.

Can you post screen shots of your preferences and of an expanded track view (showing the track's properties)?

Thank you everyone for your help and advice. I am moving on from this and getting something more in my league. This unit is now for sale if anybody is interested, or know anybody that would be interested. Reasonable offers accepted.