I lost connection when I use more than two p2p

Well, another question ^^".When I use more than two p2p and I’m surfind the net and other things,my connection resets (I have a router so it’s not a big deal, it’s automatic).I have windows xp with sp2+ all hotfix and tcp.sys patched with evilpatch(500 half-open connection). I tried to change the value of ICMP Flood from 50 at 60 packets/second and it seems to work,but it is safe?I changed the value of ICMP because after a reset,and checking the log, I see a lot of ICMP blocked from my private ip (192.168.1.189) and the gateway (192.168.1.1).