Question : Microsoft, Remote Desktop Access, Win XP Pro, Quit working for no known reason

I have consistently used Remote Desktop Access on my P2P LAN to access files, involving at least 5 PCs at times.  However, I can no long access the one PC that I usually access.  None of the PC's in the LAN can.  I can ping to the PC.  I use Zone Alarm, but turned it off and tried Windows Firewall, but to no avail.  I have rebooted all PC's and have checked the host PC to make sure RDA was still enabled.  And checked Windows Firewall to verify the exception for the port.  I get the message at each PC "Remote Desktop Disconnected:  This computer cannot connect to the remote computer.  Try connecting again...."

What should I try next?? Thanks in advance!

Answer : Microsoft, Remote Desktop Access, Win XP Pro, Quit working for no known reason

can you telnet locally?
telnet 127.0.0.1 3389
Also try this
netstat -an | find "LIST" | find "3389"