Cable Internet , LAN and Integration

Hi, I am haing two PC’s and one ADSL Router and also Cable Connection to internet, now i want to share this internet using this Wireless Router, but the problem is that when i try to connect the Router with the PC (which is hosting cable connection) i lost my internet and as soon as i disconnect my PC from the router , it can obtain internet,
my planning was to access the internet through cable using USB interface, then assign the internet sharing using ICS and which can be shared through router.
Any Suggesstions ???