Check for the following:
Mismatched LU definitions between SNA and workstation
Mismatched modenames
Incorrect SNA MODETAB and APPLID macros
Incorrect CICS RDO definitions
Incorrect TCP/IP addresses or host names
Check the CICS system log on the mainframe for messages.
Correct the spelling.
Coordinate with the TRS administrator to check connection and modename profiles, using the utility shipped with the product.
