Wireless Network 4 TP tl wr2543nd Wireless Routers Help Needed

I have just installed 4 tl wr2543nd wireless routers and 4 2.4ghz 24dbi wifi grids,house 2 and 3 are bridged together with a cat 6 network cable as you can see from the diagram,house 1-2 is connected wirelessly with wds and so is house 3-4,the wireless reaches perfect but i carnt access router one from router 4 and same with router 3,can i make these routers connect to each other so i can see all computers on the network from all 4 house's,does one of the routers have to have dhcp enabled and the others disabled? Any
help would be much appreciated as i dont seem to be having much look with them.



Here are some pics





House 1







House 2




House 3




House 4