Connection to my website

Hello,

I am slowly going crazy to try to solve this problem. Maybe somebody out there can suggest a solution.

I am on the interent with a wireless modem. Everything works perfectly, except, I am not able to get into my own website. I can browse on the net, I am able to get into any websites, except mine.

The catch is that if I plug the cable directly to my laptop, without any modem, my site comes up, so obviously the problem is in the modem. (?)

I have deleted the temporary files, cookies, etc from my computer but I don't know how to clean up the modem. (If thie modem is the problem)

Any help or suggestions are appreciated.

Suzanne