TCPIP Problem

Hallo,

i have start the STC 'TCP', this procedure was in SYS1.PROCLIB as follows:
//TCP      PROC DUMP=DUMMY                                 
//IEFPROC  EXEC PGM=STCP370,REGION=4096K,TIME=1440         
//STEPLIB   DD DSN=SYS1.LINKLIB,DISP=SHR                   
//STCPDBUG  DD DSN=SYS2.XMIT370.ASM(KBUGSTCP),DISP=SHR     
//STCPLOG   DD SYSOUT=*            TCP MAIN TASK LOG       
//OPRLOG    DD SYSOUT=*            OPERATOR INTERFACE LOG  
//SYSUDUMP  DD DDNAME=&DUMP                                
//DUMMY     DD DUMMY                                       
//SYSOUT    DD SYSOUT=*                                    

after the start the TCP ended with User Abend U0200, see the following display:


 $HASP100 TCP      ON STCINRDR                       
 $HASP373 TCP      STARTED                           
 IEF403I TCP - STARTED - TIME=15.57.11               
 UABEND U0200-01 STCP370 .STCPSS00+000006D4          
 IEF450I TCP TCP - ABEND S000 U0200 - TIME=15.57.11  
 IEF404I TCP - ENDED - TIME=15.57.11    

What is wrong, can you help me ?