vb msgbox quit playing Windows sounds and instead plays computer 'beep'

All of a sudden, in VB6 development or any EXE that is created by VB, all MsgBox sounds are the internal computer 'BEEP' instead of the Windows sound file associated with the MsbBox type (OK versus Critical versus Question etc).  I've gone into Windows Control Panel/Sounds and they are setup and sound just fine.  Other sounds played by other programs play fine.

My quess is something became corrupt, such as a VB OCX/DLL?  Help!