File name or class name not found during Automation operation

Hello I'm getting the following error on an .asp page:

Microsoft JScript runtime (0x800A01B0)
File name or class name not found during Automation operation

This .asp page works correctly from the developement enironment (sql2k & w2k
server iis 5.0) but not ours which is the same so am suspecting if there's
some extra software components that needed to be installed or security
setting on our IIS 5.0 webserver?

Thanks in advance.