I'm not familiar with Roger's Wireless, but I'll help as much as possible. With some cell phone providers (like Sprint and Verizon Wireless), they will provide you with a free ISP server to dial into. If Roger's Wireless does not offer this, you will need an account with a dial-up ISP of your choice. Once you have gotten this part straightened out, simply use the following guide to set up the cell phone with your Axim:
Click Here for Gomadic's Guide for PocketPC 2002. This Guide will also work with cables other than the Gomadic cable. Let me know if you need any more help. That guide is pretty easy to follow, though.