How to assign a static route to WAP's?

I recently setup four aironet 1300 access points for a local company to connect four different buildings.  These were to be setup in a sequetial chain and the association goes from the first to the second just fine, however from there numbers three and four both associate back to number two and no internet traffic passes beyond the second one and the last one in line (number 4) drops out every once in awhile.  So my question is, is there a way of setting a static route for all or some of the WAPs and could that be what's not allowing internet traffic to pass? I drew up a little thing as visual aid just in case I lost you.
AP-topology.bmp