In order to transparently connect two the same networks I have connected two routers by EoIP and it is working fine , but when I tried to access the network from the windows XP PC the error mesage is : workgroup is not accessible...

The computers on the both sides are pinging each other and it is the same too with the EoIP interfaces and ethernet interfaces on the both routers.

I did apsolutely everything from the short Mikrotik EoIP manual, and it all works fine but after a while computers can't see each other and can't see workgroup.

Please Help, is there a problem in the router or maybe in WinXP???