Windows machines can (only sometimes) not see the linux samba servers (after 35 days)

[maro.hartmann at lr.org]

Dear all,
 
1. I am running two linux boxes in a heterogeneous tcp-ip / ipx network.
2. Samba 2.0.7 is running on both linux machines.
3. Kernel 2.2.16
4. The problem now is that really ONLY SOMETIMES the windows 9x machines in the network cannot see samba shares.
5. After rebooting the linux machines everything is fine again.
 
Has anybody seen this problem before?
Why does this appear only SOMETIMES (after 35 days of constant good service).

Does any know what is going on here. The 35 day phenomenon is now consolidating.

Thank you very much in advance if any has any idea.

Regards

Maro Hartmann