XP professional troubles

[chyrus]

Good evening,
I've developed a large application using LV 7.0. This one is a user interface between an operator ad an remote data logger connected with RS232 or via modem (analog,GSM,GPRS). I'd made a lot of tests with windows OS (98,2000,Millenium). The development environment is XP pro. I'd repeated the same sequence over each machine:
1 Install modem driver (USrobotics 56k external)
2 Install LV application
3 Test connection over hyperterminal
4 Test the application
Everything is seemed go rigth until I've installed the program on a Xp professional machine. As the wellknown Murphy low teachs, something isn't gone the right way: I can establish a connection with the modem, but after this i'm not able to send/receive data from modem.

I've tested the modem over a hyperterminal connection and i'd not found the trouble. If the terminal goes whit "manual" commands why my labview application, with the same command list sequence don't go? Note that before start operations I'd disabled Antiviruses and Firewalls and the call was over a phone box.

Thank you 4 your attention and have a good time.

Chyrus

[Matthew_Williams]

Have you tested your application after booting the PC without first testing with Hyperterm? We have seen instances where Hyperterm (or another serial port app.) would not 'release' the serial port, making the port unavailable to other applications. Any error codes from the serial .vis?

Matt

[chyrus]

Dear Matt,
it is very kind of you for your interest in the trouble I met. I've tried and tried all configurations. Now i'm investigating in system conflicts or driver incompatibilities.
I wish to be not contricted to install labview environment on the target machine to fix the bug.

Tanks a lot,

Chyrus

[Joe_H]

When you done the build for the exe did you include serisl port support for the RS232.

Joe

[chyrus]

Dear Joe, tanks for you reply. I'd included the support for RS232 in the parameter builder settings. It was the first thing i've checked.

Chyrus