I have comcast cable internet.  My wireless router is hanging off of my cable modem.

 

I have 2 laptops, 2 desktops, 2 xbox live wireless routers all hooked up with internet access.  They all work fine. 

 

My problem is that I can't share the drives between the 2 laptops and 2 desktops.  I also can't share a printer hanging off one of the desktops.  I have the drives and printer shared on their systems.

 

Is there a difference between a wireless network for the internet and a network for sharing devices?

 

Thanks for any information you can share...