Laptop Upgrade

[Edward Cespedes]

I recently purchased a Toshiba laptop, which came with XP
home edition SP1, but when I upgrade to XP professional I
loose my modem connectivity, meaning that in Device
Manager the modem is still there and when I run diagnose
tool to query the modem, it comes back fine. But when I
try to configure a dial up, it says that there is no
modem connected.

Do you have an answer to this problem?

Please advice

Thank You