Trust between two forests end with No Logon servers available to service the logon request

I have very strange problem with domain trust between two forests.

I have forest A and forest B .Forest A is domain1.local and Forest B is domain2.local
When i try to create and validate  forest trust between the domains i stuck on an error :
The trust cannot be repaired because: There are currently no logon servers available to server the logon request.

I have checked a hundred times DNS lookup problems,Host files and networks connections.It still not working
The connections is like this :

server.domian1.local <-------Router------->Server.domain2.local
Routing table and firewall are fine .Im am using Windows 2003 Standard Server on both Sites.Domain function level and forest function level are Windows 2003 .

After months of investigating that error i create another forest in site B and try to create trust between the 3 domains.It works fine
The new configuration is like this

server.domian1.local <----router--->server.domain2.local -----Switch ----server.test.local

Trust between test.local is working fine with domain2.local and domain1.local .The only problem is when i try to create trust between domain1.local and domain2.local.

DCdiag on both problem domains shows no fatal errors,dns lookup is ok,wins server if OFF.
DNS servers on both domains are configured with conditional forwarders

domain1.local can create trust with another forest - mycompany.local and is working fine .The forest contains only one domain controller.

Any bright ideas ?