EmulatorII-list

Hey all, I've just recently got a Mac Classic running 7.0.1 OS. (4mb 
ram)

I've previously been able to get my mac IIsi to talk to my Emulator II, 
but the Classic is proving to be stubborn.

SoundDesigner try's to talk to the Emu, the drive on the emu whirs, 
then I get an error on the mac "I can't communicate with Emu II" and my 
emulator II locks up with a message on its display "Under Mac control", 
but no button pressing or anything will free it up..
Choosing the option in SD called "Remove mac control" does nothing 
either.
The only way I can find is to power down the EMU II.

Does anyone out there with a Classic running 7.0.1 have any tips?
I've switch "appletalk" to OFF, switched off virtual memory etc.
I've played with the extensions folder, (Which i'm guessing is similar 
to 'drivers' on a PC?) 

Does anyone who has a working classic -> Emulator II configuration have 
a list of what is in their extensions folder?

Any help would be appreciated.

Regards
Mike