You CAN do this, however I would suggest using one router connected to your modem, then using either range extenders or access points instead of routers if you need more coverage, it will save you a lot of headache...
I would guess your issues are being caused by DHCP (Dynamic Host Configuration Protocol) conflicts due to running 3 DHCP serevers on the same network.
Access point = wireless with no DHCP server
Router = wireless with DHCP server
I would guess your issues are being caused by DHCP (Dynamic Host Configuration Protocol) conflicts due to running 3 DHCP serevers on the same network.
Access point = wireless with no DHCP server
Router = wireless with DHCP server