Web services testing with CICS TS v2.3   

I have a client (SOAPUI cleint) sending web service request to a CICS TS v2.3 program for process, I am getting ASRA abend with

<title>CICS Web Interface error</title>
<h1>500 Internal Server Error</h1>

Sending XML request through SOAPUI client(http://www.soapui.org not java cleint) to CICS TS v2.3

Code at Point of ABEND

*--------------------------------------------------
* CONVER ASCII TO EBCDIC FORMAT                    
*--------------------------------------------------
 CONVERT-ASCII-TO-EBCDIC  SECTION.                 
     DISPLAY 'CONVERT-ASCII-TO-EBCDIC:'.           
     MOVE FUNCTION                                 
             DISPLAY-OF                            
               ( FUNCTION NATIONAL-OF              
                    (LS-INBOUND-AREA ASCII-CCSID), 
                   EBCDIC-CCSID                    
               )                                   
          TO PASS-BODY.                            
                                                   
 CONVERT-ASCII-TO-EBCDIC-EXIT.    
     EXIT.

What are al available methods that we can test conversation between client & CICS mainframe regions?
Appreciate help for any docs/examples/URLs where I can get testing informationm.

Thanks & Regards,
DS.