faxman jr reports "no devices found" when using your sample app, on some machines and not on others
modem on the machines are (as report in Control Panel windows XP SP2):
PCI Soft Data Fax Modem with Smart CP
PCI Slot 7 (PCI bus 2, device 2, function 0)
winfax works fine on all machines
no other software using when we try you sample app