Detonator Virtual Error

I just installed the extension 'Detonator' onto my Unity 3.0 and when I tried to run its example project, I got the following error which prevented its running:

"error CS0106: The modifier 'virtual' is not valid for this item"

Does anyone know how to correct this?

This is a minor compatibility snag with the new version of Mono.

When I removed the modifiers, it worked fine for me.

how to remove modifiers ???