Help removing Username/PW prompt in Workgroup

Hello, I'm having a very interesting problem. I have 2 Windows XP
computers in a workgroup (MSHOME). One is XP Pro, other is XP Home. My
computers have been able to communicate both ways, until earlier today
when it suddenly started asking for a login password. Today morning XP
Pro's firewall didn't want to start up for some reason or another and I
googled the error and got a Microsoft solution, which was basically to
reset the firewall in the registry, using a key that they have available
for download.

After that, I had issues even pinging. Now I've gotten them to ping by
IP and by Name. However, when I try to access the Pro computer through
the Home computer it prompts a login box. Initially the Username field
was greyed out and said \\"PRO"\guest. After much research on the login
box, I changed a security poilicy setting "Network Access: Sharing and
Security model for local accounts" to Classic - local users authenticate
as themselves. I thought this would remove the login box altogether
which is what I want but it only made the Username field editable...

Notes:
Both Windows Firewalls are currently off
Pro can browse Home's shared files
But Home gets a Login Prompt to browse Pro.
Guest account is disabled on Pro.


All I want is for it to stop asking prompting for username and password
box, this is a private network and this is just an unecessary
hassle/waste of time.

Thanks for your time.