Sign on sign off problem

[Daren Small]

I have been having this problem with my internet ever since I set up the home network in my house. I will connect to the internet automatically upon every start up and disconnect with every shut down. My problem is that if there is an amount of time (which is variable) of which I am inactive and even sometimes when I am on the computer, the internet will just shut off and will not allow me to reconnect. Do you have any suggestions as to how I could solve this problem? Thanks.
-Daren Small

[MetalMilitia]

What are you using? Cable Broadband, ADSL, DSL, 56k? Also who is your ISP?
Have you tried reinstalling you modem drivers?