problem loading plugins into sound forge....

The past 6 months ive had the sonalksis eq loaded into the plugin manager and all was workin fine till the other day.

I went to DX favorites to bring up the plug and the screen tells me sound forge cant read this plug no more. Other external plugins still work though. I tried reloading the .dll file but sound forge just won't pick it up. I tried reloading sound forge but it still don't work.
The eq still works fine in FL Studio though.

Q. when loading external plugs to sound forge, where's the best place to save the .dll file?

I tried C:\Program Files\Sonic Foundry\Shared Plug-Ins\Audio\ but that was no good. Other plugs are at C:\Program Files\Sonic Foundry\Sound Forge 6.0 and that seems to work fine (except this fark'n sonalksis eq).

Any help would b greatly appreciated :-)