How to network 3 computers and 2 playstations.?

I am using a Linksys 4 port router to connect 2 laptops through wireless for internet, one desktop which uses an ethernet cord and one playstation 3 which connects through wireless. My problems is networking the 3 computers together which I have been able to accomplish but when one of my laptops connects to the desktop to either print or obtain files, the playstation is kicked off of the router and loses its internet connection. I cannot figure out how to fix this. To add to the mix, my son wants to connect his playstation to the internet which would be done using an ethernet cable.

I am basically wondering if:

1. The 4 point router can only support 3 computers/playstation or if I can hook up an additional playstation. would be 3 wireless and 2 ethernet cable

2. What I can do so that the playstation is not kicked off when one of the laptops connects to the desktop. What am I doing wrong?

How to network 3 computers and 2 playstations.?vista

Theoretically, you can have up to four wired devices and another six wireless with this router in a workgroup network. Any additional devices would need a Server OS to handle the network.

I can not see any reason why the playstation would be kicked off the network simply because the other machines (nodes) are all turned on. They should all tull along together very well.

Are you sure you are using the correct cable type to hook up the computers to the router? You can't use a cable which is meant for hooking two computers together, such as in an adhoc network, which does not use an Internet connection, but can transfer files between devices. If you have the wrong cable, then trouble can occur.