It appears that you are missing one or more required DLL files that are no longer installed by MS as part of the Vista OS.  Attached is a zipped file that contains them.  Here are the instructions for copying and registering them.
   
1.	Unzip the attached DLL files into your C:\Windows\System32 folder
2.	Press Start Menu -> All Programs -> Accessories -> Right Click on Command Prompt -> Run As Administrator.
3.	Type “cd C:\Windows\System32”
4.	Type “regsvr32 dsound.dll” 
5.	Repeat using the other two file names to register all included DLL files.
6.	Try running DA

Note: If you don’t do Run as Administrator, the regsvr32 will fail.  

If this does nto work, please let us know for futther troubleshooting.