Installation Problem: SCREEN won't work

1
Hi all.

Because I was having trouble using the installer, I grabbed the raw
archive and used that instead. That seems to have worked in general, but
now SCREEN won't work. I get

>>>>
» SCREEN('Closeall')
Unable to load mex file:
C:\MATLAB6p5\toolbox\psychtoolbox\psychbasic\Screen.dll.
The specified module could not be found.


??? Invalid MEX-file
<<<<

whenever I try to call SCREEN. Screen.dll is indeed in the stated
directory, and I am running in -nojvm mode.

Any thoughts?

Many thanks,
Charles.