hi , i have a lot of networks around my position , i have Wap54g with a directional parabolic antenna . when i turn the antenna i found some networks , but when i refresh it , it can't find it !! when i refresh again again and again , it can find for one time , again , it can't find !! where is the problem ?? i should say that other AP's like Senao can find this network and the network's signal is good enough i think . so where is the problem ?