You should have left the extra details in your previous post. IIRC you were having a problem with external devices screwing up at different samplerates. This is important.
I saw that post earlier but wasn't smart enough to help. Thing is you need to keep external devices in sync and based on your now edited post that you had external gear or something inside sonar set weird. Not enough details were provided.
The only advice I can give (and it is paranoid, dum dum, non professional advice) is keep everything sync'd. Always use the exact sample rate and bit depth through out a specific project until it is completed. When using external gear, if it has any settings like this make sure they match up to your project, soundcard and whatever else is going on.
Just keep everything consistent and bad things are less likely to occur. There are several mechanisms that allow mismathced this thats and the other to play reasonably well together in Sonar but my philosophy is... don't tempt fate. Unless you REALLY know what you are doing make sure everything matches up wherever and whenever possible.
More details will help the smarter dudes help you.
Cheers.