Can anyone tell mw why REGASM would be giving me the following error:

Type MyType from Assembly  blah, Version,Culture, publickeytoken can not
extend from any other type.

I am not sure why I am getting this error as I can see nothing wrong.  There
is also no documentation on this error and why.

My class looks like

class ClientExt: VOExtension, IClientExt, IVOExtension

VOExtension just inherits from MarshallByRefObject and a couple interfaces.

Thanks,

Dave