Can't Browser The Web On 3g Modem After Enabling Wifi

I have a 3g usb modem hooked up to my main Windows xp laptop. I'm also sharing that 3g connection with ICS out the ethernet port on the laptop to my wifi router.

All works ok and I'm able to browse from all computers connected to the wifi router except when I turn on the main laptop's wifi to connect to the same wifi router that it's connected to through ethernet for ics.

I am able to ping google and stuff and also use skype but I can't browse the web on any browser. If I turn off the wifi card on that laptop then I'm able to browse again with no problem on the main laptop and on all other connected computers.

I'm not sure but I'm guessing that the browsers are trying to connect through the wifi connection and no longer through the 3g usb modem?

The reason that I turned on the wifi connection of the main laptop to connect to the router is because connected to the router is also my security cameras dvr system and this way I can see my cameras on this main laptop.

So in other words, I have to turn off my main laptop's wifi connection to be able to browse the web but then I cant access the security system's dvr any longer.

My router's ip is 192.168.1.1
My dvr's ip is 192.168.1.100
My laptops' ip is 192.168.0.1