The BR400 is distributed by a lot of ISPs as part of thier internt package. I that how how you came by yours or did you buy it stand alone? If its through your ISP your best deal is to contact them as you may need to be assign another IP.
you could go to the inexq site thier direction for setup ar kind of screwy though. they use Win2000 directions for thier winXP setup guide. you may beable to muddle you way through it. any specific questions feel free to ask