3Com wireless problems

OKay, another one with 3com from me. In another business, I have a wireless LAN set up using a 3Com? 11Mbps Wireless LAN Access Point 6000
Product #: 3CRWE60092A. What is happening with this is that at various times, when the users are trying to access the internet, the Access point’s configuration screen comes up on the computers through IE5.5 & IE6, and to browse the internet after this happens, the PC must be rebooted. It happens when they try to go to any website, like excite.com, or places like that. Each PC – there are 5 – have a wireless PCI adapter card, Product #: 3CRDW696. Has this happened to anyone else, or may my access point be bad? The configurations are good, and the signal strengths are decent. THanks for the help.