Unable to extend virtual server

[t1tigreguy]

I am running SBS 2003 with sharepoint services. I use to be able to extend virtual servers but now am unable to do so. I am not sure if its procedural (the way I'm doing it) or if the problem actually lies within sharepoint itself. I am however able to create sub sites, this use to work and for some reason I can not do this anymore either. I would start over except for the sp sites that currently exist.

Can someone out there assist me with this?

Thanks,
Tony