Wingate freeze my modem

[alceon]

I have Wingate 6.0.4 installed. I use SDSL service and using ZTE ZXDSL 732 modem. Whenever someone is using Bit torrent or play online game like GunZ or Gunbound for about 10 minutes, my modem will hang/freeze(cannt ping or access to the web manage page) and all internet activity is down. I need to reboot my modem to get back the internet. I am using winroute now with no problem. It's this wingate problem or my modem problem? I have not access to my modem support website(firmware upgrade etc..), cause they deal with my ISP only. My ISP doesn't offered support on using router. Direct connection does't bring down the modem on using the above program.


EDIT: SORRY it's not wingate. It is my modem firwmare problem.