dhcp problems / laptop (wifi+lan).

hello, i have a laptop with wifi+lan / suse 9,3, by default both are active waiting for dhcp, so when one is receiving ip, it can't write /etc/resolf.conf, of course very annoying. when i select "activate when cable is plugged" for lan and "manual activation" for wifi, it works, only one interface is waiting for dhcp info. is it a normal situation to work with manual activation ? is it supposed to work with the default settings ? another question : what is the preffered app with suse 9.3 to switch between wifi networks settings ? in yast the wpa settings are constant and unique for the wifi card. (thanks for the wpa support, it works !) thanks, paul.