[SOLVED] Lagg when hosting!

Hello there folks,
I have a problem...
I use the following force host method
in the menu
Then click on a gametype
Type in console
Then it starts my match and I'll fast restart or map restart when there is "Enemys forfeiting"

Now here is my problem:
It laggs really bad, not the usual lagg but its like Frame, play 3 secs, Frame 3 secs, play 3 secs, Frame 3 secs

My NAT is open...
Other people do not lagg! Please help

I dont think this is a problem with your hosting if other people dont lag but not sure