All computers can print and all can surf the Internet.
One computer (XP pro) cannot open the management page of a printer (192.168.0.13) or the Wireless Access Point (192.168.0.101). It can ping the hardware but Internet Explorer v 7 cannot open the management page. Explorer shows HTTP 440 Bad Request. Sometimes I can see the name of the device appear in the heading for Ie and then the bad request message.
The only computer with a wireless access works fine.
The server (192.168.0.1) can open the page for printer and access point and a computer using XP Home can open the management page for both.
Security is set for medium in Ie
The printer with 192.168.0.14 is a recent addition, the others at least a year old.
Gateway is 192.168.0.1 which has the server and Internet Cable Modem
Subnet mask is 255.255.255.0