RFC connection problem in ECC 4.7 and ECC 6.0

Hello friends,
Created RFC connection in 4.7 version of SAP and used it in a java program.  (STFC_connection) was the function module used.
it all worked fine. Later when i tried the same thing in ECC 6.0 it failed and throws communication_failure exception .
please guide me in this issue.

Hi...
Check the Unicode/Non unicode status in MDMP&UNICODE  tab present in transaction SM59 while chking the connection.
if your ECC6.0 is unicode system then you need to check the radio button present for Unicode in  MDMP&UNICODE   tab.
Regards,
Lokeswari.

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