Accociation Timeout & authentication timeout - HELP ME

Hi all,

I am having a problem.

When trying to connect a couple towers to my currently working 5ghz Sector antenna I get association timeout & authentication timeout errors. However, if I leave the interfaces enabled, they might at times associate for as long as 2-3hrs or 5-10mins, currently I have the interfaces disabled.

the error XX:XX:XX:XX:XX:XX@wlan1: failed to connect, on 5***, association timeout
the error XX:XX:XX:XX:XX:XX@wlan1: failed to connect, on 5***, authentication timeout

Situation:
AP Tower- XR5 + 16db H-Pol Sector (Origionally had R52h)
Client Tower 1 - R52h - 23db Panel - 5 Miles (-64db to -69db)
Client Tower 2 - XR5 23db Panel - 13miles (First had r52h) (-72db to -74db)
Client Tower 3 - XR5 28db Grid - 12miles(first had r52h) (-60db to -62db)


Client 1 has not had problems
Client 2 + 3 are having problems

I have tried:
setting static ACK on all towers
switching nstreme on/off
switching cards (on all non working points)
multiple frequencies (from 5500 to 5780)
10 and 20mhz channel sizes

I have not tried:
Switching Cable or Antenna on “AP Tower”


Problem #2 & #3 (possibly related?)
#2 - will sometimes report a signal as much as 10db-20db lower than first stated. It will show this signal for as long as 10-20mins, I will leave it and come back with signal strengths restored to original strengths (happens on both non working towers)
#3 - tower will not connect on 20mhz with no nstreme (on Client 1 - 5mile connection that would normally be fine)

Any feedback would be appreciated

Thanks,
Josh

This usually means the signal is too weak. Check the radio cards, power source, and that all connections are proper.