Mocking Board Problems with IIGS

[british@imap1.asu.edu]

Help! My newly acquired IIGS runs all II+/e software well but
it doesn't work with my old mocking board.
 
Games either failed to recognize the board or simply crashed. 
I've set the IIGS at normal clock speed and tried two different
boards but the symptoms were just the same. It makes me wonder
whether a II+/e mocking board will work on a IIGS at all.
 
If a special mocking board is required and if anyone has one for
sale please let me know. Thanks!
 
Acho