OK...it appears that you have a USB/ethernet connectable modem. Do not use the USB connection for this, use the ethernet connection.
First...if you installed the drivers for the modem before...please remove them. They are not needed. To do this, please use Device Manager.
You don't need drivers for the modem, those would be required only if we were going to use the modem's USB connection to the system. Since we aren't going to use that, there is no need to install drivers for such. All you have to do is connect it to the NIC.http://www.toshiba.com/taisnpd/products/pcx2600_manual.pdf
You need to ensure that the drivers for your NIC are installed
. Go to Device Manager, take a look. If you see any items with a yellow marking, this indicates that drivers are needed for that device to work. Drivers for your NIC should be on the CD that came with your motherboard or system.
Once the drivers for the USB modem connection are uninstalled...and the drivers for the NIC are installed, you simply follow the path laid out in your manual, using the CD provided you.
I suggest using the XP Network Wizard to set up the connection properly, after all hardware connections are accomplished.http://www.microsoft.com/windowsxp/using/n...utt_june11.mspx