Click on the Configure Button. Click on the Connection tab. Double click on My Computer. Double Click on Dial-Up Networking. Check the User Name.
Some user names begin with a capital letter P followed by lower case letters.
Refer to your original subscription agreement for the correct spelling and case. On a PPC launch PPP from the Control Panels. Refer to your original subscription agreement if you are unsure. On a 68k Mac launch ConfigPPP from the Control Panels. Refer to your original subscription agreement for the correct spelling and case.