SAP.NET Connector CPIC Problem

SAP.NET Connector CPIC Problem

Hi !
I am using SAP .NET Connector to take data from the serial port to a Z table using the RFC.
The serial port is sending the data to the Z table, but I am getting the following message from 'Microsoft .NET Framework':
-----------------------------------
An Unhandled exeption has occured...
CPIC-CALL:'CMRCV'
LOCATION CPIC(TCP/IP) on local host
ERROR: illegal parameter value (function=SAP_CMTIMEOUT2/parameter=conversion_ID / value=08519490 @a~||)
RELEASE 620
COMPONENT CPIC(TCP/IP)
VERSION 3
RC 769
MODULE r3cpic.c
LINE 7398
COUNTER 465
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It gives me two option on this message screen. ?Continue? and ?Quit?
If I click ?Continue? then I am geting the data and on clicking ?Quit? my .NET program is switched off.

I shall be grateful if someone could help me.
Regards,
Firoz.