I have ran my anti-virus, and adware and spy sweep, it hasn't found anything. I have to delete my dial up account and create a new one every time I dial up. after i connect my number changes again, how do I fix this?

If you think you are infected submit a hijackthis log here.

How to submit a hijackthis log

Download Hijackthis

Try running Sysclean you'll also need the virus template file from here lpt***.zip is the file you need.

Also try running A2 Free and Ewido

Run the scans in scan only mode\don't opt to clean as you need to submit the files your AV scanner is missing if you are infected. A comprehensive list of who to mail to is here.

I'd also install/update/run Spybot

What kind of connexion to you have: dialup, DSL, Cable?
Are you doing all this because your number changes, or because you have problems connecting to your ISP?
I am not clear about what is happening.
Regards,
John

I'd start with A-squared (A2) as it focuses on trojans and dialers.
It is free for private use but registration is required.
Download it from here: A-squared