internetconnection is gone after installing comodo [Resolved]

After i had installed comodo firewall on xp i could’nt connect to the internet anymore. after rebooting windows said that there was something wrong with my connection. so next i uninstalled comodo and after the reboot my connection worked fine again. i tried this several times, also with an older version of comodo and an other firewall but they all had the same problem.
Does anybody have any idee of how to fix this problem? (L) thnks

The problem has been solved. My old firewall(sygate) wasn’t properly uninstalled :(. everthings works fine again (:WAV)

I will mark this topic as resolved. If you need to re open it let one of the moderators know.