Internet connection Sharing

[A]

Using XP Home. Trying to share my ADSL connection with
another computer on a wireless network.When I
check "Allow other network users to connect through
this computer's Internet connection" on the ADSL USB
modem Dial-Up Properties, Advanced tab, I get an error
message:

Cannot enable shared access.
Error 2: The system cannot find the file specified.

Can anyone help?