When running under Windows XP as a service - no matter if the HM properties are set to logon as <username>/<password> or as Local System - the following issue occurs:
HM does not recognize modem/COM port and fails to send page; shows error "Error: Error Opening COM port (TAPI10000)"
Everything works fine when not running as a service.
This has been tested on a clean XP build as well as with SP1 and hotfixes.
Cannot reproduce the problem. HostMonitor works fine on our XP systems.
Have one suggestion, may be it will help: add FixedPagingPort=COM3 line into [Misc] section of the hostmon.ini file and restart service. COM3 its for example, you should use COM port that was assigned to modem.
H'm, its one of cases when I don't know what to say
TAPI devices are not related to current user settings, it means program must work in the same way under any account. I am still checking MS documentation but did not find anything useful yet...