DNS Lookup problems

Hi List I am having a problem on my Super Install (final-20051003-standard-kde). I have a dns running with dnsmasq on my 9.3 server which works fine from my other 9.3 box, but is making problems with my 10.0. if i do an "nslookup server" in an terminal, it works fine on both, but if i add an repo in yast using the name or using firefox to go there, it takes ages and then it displays another site of from the inet. There is a dsl router acting as dns to which all requests are delivered the dnsmasq box cannot resolve. The /etc/resolv.conf is the same on both boxes. Even removing the second nameserver from resolv.conf does not solve the problem! Does anyone know, whats going on here? thanks, rauch