Suse 9.3 behaving strangly

Greetings I can't put my finger on this one! I load plenty of PCs and my dhcp is working perfectly (Fedora suse9 9.1 9.2 etc even a gentoo box and a centos box, With 9.3 it takes a good 10 minutes after boot-up before the system finally gets an IP address from the server. I have tried disabling the Susefirewall but it does exactly the same.. Any ideas as to what could be causing this. Please note that it is not one PC I have lots of them doing it? All were loaded manually (one by one) Thanks Chadley