Problems with serial Communication

[George]

Hey everyone,

I am trying to write a serial application that will be used as a subvi. For the most part, it tends to work on and off, which is not good. I send commands to the device and it works. Other times it does not. I am not sure if this should go in this forum. This serial application is being built using the PDA toolkit, so i assume so. I have some screenshots, describing my problem. ANyone familar with serial communication, please chime in, your help is appreciated.