NAT

I use Win2000 as a NAT connect to Internet
I use the 64/512 ADSL and my server is Win2000
ADvence Server with 512 MB RAM and s PIII800 CPU

I use two lan card, I connect to ADSL and One connect to my LAN. the problem is My connect always stop, and I had to stop the Lan CARD witch connect to my Internal Lan, and Restart again. and it’s back to work. then after wail My net stop respond again… then I have to do it again..