can't get KPPP to work with modem

[perlster]

I have a Dell Dimension 4100. A Lucent WinModem is on COM3. I've tried various combinations of options to get KPPP 2.2.0 (Using KDE 3.3) to work, but it always reports the modem is busy.

Modems - Edit... Device
Modem device /dev/ttyS2 (tried several others)
Flow control... (tried Hardware, Software, and None)

Modem
Query Modem... => "The modem is busy." (The modem is NOT being used.)