Stereogram Animator requires the file VBRUN200.DLL to be in your WINDOWS\SYSTEM directory to run. If VBRUN200.DLL was not included with this package and it is not already in your WINDOWS/SYSTEM directory, then download it from from a BBS or other on-line provider(i.e. Compuserve or America Online). If VBRUN200.DLL was included, then move it to your WINDOWS/SYSTEM directory if you do not already have a copy of it there. (NOTE: if you already have a copy of VBRUN200.DLL in your WINDOWS/SYSTEM directory, then just delete this copy.)