Switching Internet Connection

Hello everyone,

We have a IBM laptop under Windows XP. We mainly use this laptop between 2 locations, 1 at work (using LAN connection), and 1 at home (using wireless connection). The connection in work requires a configuration script, where we can put it in by going to internet properties --> connection --> LAN settings --> Use automatic configuration script (then enter http://www.h..........etc in the field).

Basically, when we bring this to home, the wireless works fine, but the next day we bring the laptop back to work and connect to LAN, the configuration unchecks and disappears by itself, so we have to enter the http://www.h....etc all over again. This didn't happen to us before but something happened.

Any help would be great, thanks.