Domain Master Problems

[Martha Peter]

Hi Everybody.

Till this time things went just perfect, but then i got this message:

find_domain_master_name_query_fail: Unable to find the Domain Master 
Browser name KOLI<1b> for the workgroup KOLI. Unable to sync browse lists
in this workgroup.

And clients from another domain can't see the server's shares or just
after quite a long time. The version is 1.9.19 pre alpha running on RedHat
5.1
I don't know what caused this problem, it was out of the blue. 
Any help are welcome. Thanx in advance,
			
			Peter Martha (MP)