My new WRT54GX4 seems very shaky. There is no problem with the desktop computer and wired connection, but the wireless connections are intermittent, even at very close range. One computer with a USB adapter keeps hanging up due to network connection problems. Two laptops won't connect at all. One says it is connected to the network but there is no internet. I did not have any problems with my previous router. I have restarted both the router and the computers several times. Any ideas? Suggestions?