Have problems nat router

Hi

What i understand is that you are facing some NATTING issue with teh modem and router you are using to solve this you simply need to change the default IP address of your router so that you can use both router and modem in your network, for further clarifications you can post another question in which i request you to mention the manufecturer name of your router and modem so taht we will able to solve your concern in one shot.

Thanks
Harmeet :)