I dont know what youve done but youve definately done something weird.
What operating system are you using?
Try reinstalling vdmsound, the update and its launchpad
Also make sure you're actually running S+M through Q+E rather than just vdmsound. Q+E fixes the slow speech issue. Also make sure youve done the filecopy and that you really are using version 3.5 not 3.
DOTT again make sure youve done the filecopy.