[Plugin: Role Scoper] Rolescoper

Ive got a problem with rolescoper.

i want to make my friend an editor of one page. I got this. But now he can’t edit/create the pages because the edit page will not be loaded.

Otherwise said: The page doesnt load, i stays blank. I know its an rolescoper error because i tried the deactivate and the he can create/edit pages, but then he can edit also mine.

I hope you can help