Receiving broken data frames from Nokia 5110

Hi All,

I am writing an application in vb to communicate with nokia 5110 through FBUS. I have gone through gnokii and Gammu and successfully communicating with nokia 5110. But the problem I am facing quite often is: the reply frame, I get from Nokia is partial. for example: I tried to retrive the hardware/software version of the the device, I could able to get the full reply frame 30-40% time.

Can you please tell me where am I making the mistake?????.

thanking you,

Sanatan