e3200 and dlink switch not working

Hi.

So I installed a switch to add more ports to my linksys e3200.

I connected 3 PC's to the linksys switch, and they all work fine, but than when I connect more than 1 extra to the switch I can not pink the linksys anymore. So if I want the linksys still to work I need to have MAX 4 wired users.

The weird things are just starting to happen though:
I can connect a wireless AP to the cisco or switch, and than any number of wireless consumers.

And if I connected say 6 PC's to the switch, the router wouldn't work, the internet wouldn't work, BUT all the PC's would still get their IP's assigned by the linksys DHCP. And they can all ping eachother and fileshare.
Even DLNA works.

SO why can't I have more than 4 wired users on my cisco?