Linksys wireless network 3 WRT54G plus 1 WAP54G on the fritz

I have setup my home network that connects 3 different houses wirelessly. Router 1 is the gateway, which is then WIRE connected to the AP.

Routers 2 and 3 are located at the other houses <120 feet away(for the farthes house).

Numbers 2 & 3 are placed as close to house 1 and the AP as possible.

The network is connected and everything works for a short time, for a long time, or barely any time at all. It is pretty random how the connection will or wont work. It isnt during any specific time during the day, it happens randomly.

Routers 2 & 3 connect to the AP which has upgraded antennas for better connection. Router 3 also has the upgraded antennas but has the same issure that router 2 has.

I changed the channel of router 1 so it dosent interfere with router 2&3&APs signal.

I added router 1s wireless MAC to the ignore list on the AP. The routers support different settings that the AP dosent think as valid. I changed the settings on each of the routers to be acceptable in the APs settings.

At present I have not seen any interference on the channels I am using, the only other thing that could be causing interference would be the home phones.(2.4ghz routers and 2.4 ghz phones).

I have moved the channels around several times but the disconnects and intermittent connection stayed relativly the same.

I am pretty much out of Ideas

The problem isnt really with the wireless I have notised. The routers wireless connectin to the bridge works great. The wired connectino that goes from router 1 to the AP is what keeps dropping. I am unable to determin what is actually causing the connectino drop. Usually un-plugging and plugging back in the router 1 fixes the connection. I have updated the firmware on all of the routers and AP with their correct versions, and model. I am almost thinking that router 1 is just a pos....