error in SerialTerminal program sample

[JAPA]

When run this program Open Port Command it´s oK; but when send a character answer: An error ocurred on sub_btnsend_click. IOException Continue?. What can be the trouble?

 

[Erel]

Which port did you open?
Where are you connected to?
What type of connection are you using?
What device are you using?

 

[JAPA]

Which port did you open?....................COM3
Where are you connected to?......Conecting Rx and Tx of DB9 conector
What type of connection are you using?.....Adapter cable IPAQ & DB9 conector
What device are you using..................HP IPAQ 6945

 

[Erel]

Did this communication worked with any other application?
There are several free serial terminals.

 

[JAPA]

Did this communication worked with any other application? Still now, not
There are several free serial terminals.. And your answers, were:
Port Open Port Send "a" Receive
COM1 An error on sub_menuopen
COM2 An error on sub_menuopen
COM3 Ok IOException
COM4 Infrared port
COM5 An arror on sub_menuopen
COM6 Bluetooth
COM7 GPS
COM8 ok ok nothing