How to get sound back on the computer?

ive recently opened up a music program thing called vst host and vst adventusdf.dll and now my computer does not have sound either through headphones or speakers. ive tried going through all the settings in control panel sound devices and yet no trouble question marks and checked the mute. Everything seems to be as it was before (not on mute) but still no sound. im using sound blaster 5.1 on a windows xp sp3. i have not touched anything to affect the sound other than opening up vst host then in host opening up VST Adventusdf.dll then boom no sound. Please help me get my sound back. Keeping in mind that the mute is off and the program has been deleted but still no sound