hey guys, thanks for the help, greatly appreciated. I got it sorted (for now). I couldn't find a control panel for my audio interface so I am guessing it is accessed through sonar. I did as you suggested and accessed it through preferences, ASIO control panel, but the sample rate and buffer size was matching what i already had set, so that seemed fine. However, following Bob's suggestion regarding the type of USB port, I moved the interface to the a different usb port and when i hit play the track played perfectly :) So i guess it is the usb port that was causing the problem. Again thanks for all the help and hopefully I have learned at least a little (though I'll probably be back pretty soon with my next problem hehe)
thanks D