IIS 6 - Can"t check serverextensions 2003, Can"t publish from Fron

We've recently upgraded to Server 2003. Everything was working prior to the
upgrade.

From IIS administrator, when we try to check Front Page Extensions 2002, we
get a challange response box, even though we ar logge in a an administrator.
no matter which login we try, we get access denied.

I suspect that this is related to our inability to publish anything from
Front Page 2003. We first get a box that says:
"The remote web site does not exist, would to create it?"

We click yes, then get the following Error message:
"Server error: Unable to access configuration for Microsoft Information
Server."

Any Ideas woiuld help. Thanks in advance.