USB COM Port Working With HyperTerminal not with LabWindows

[UsmanAslam]

Hello,

        This can be a informative query rather than an issue. Well, I am using a certain device which connects to the computer using USB interface. It needs to install its provided drivers. After successful installation its COM port number appears in the list. 

When I choose that COM port number from 'HyperTerminal', it just connect instantly i.e. without asking any baud rate,no of start/stop bit,parity etc. Even when I try to open that window for baud rate etc, it appears dimmed/disabled. Moreover, device communicate perfectly and respond to the commands mentioned in its manual. 

But when I try to communicate using Labwindows, it doesn't responds. Maybe because I need to know exact BaudRate,Start/stop bit etc settings to communicate with LabWinodws. 

But how can I know these settings ? Or is there any other way to communicate ? I mean not traditional serial communication ?

Regards.

[mkossmann]

First idea: termination char. If you type in a command in Hyperterminal , you hit a "Return" to send it. That sends a CR and a LF to the device. Are you missing these characters in Labwindows when sending a command ?