Home Network

Been working for several hours to no avail. Have a Win98SE
Laptop, Win2000 Laptop and XP Pro Desktop set up in a
workgroup, MSHOME. Have run the XP network wizard and
successfully have the 98SE and Win2000 boxes sharing files
and printer. The XP Pro machine does not appear in the
workgroup. When I try to access the workgroup list on the
XP Pro machine I get the following error:

"MSHOME is not accessable. You might not have permission
to use this network resource. Contact the administrator of
this server to find out if you have access permissions.
The list of servers for this workgroup is not currently
available"

I am signed on to the XP box as an administrator. I am
able to ping via IP address all boxes from each machine. I
have simple file sharing (SFS) disabled and have the
Sharing and Security model under Local Policies - Security
Options set to Classic - local users authenticate as
themselves.

What am I doing wrong here?