Hi Sudarshan,
if you are sure that BP for the user is good (I am still not clear if SOL:001 is you SOLMAN system or managed system - if you try creating Incident in both, then your BP must show two different external systems, but your screen shot shows only one),
then one more thing to check is BCOS_CUST table for Appl. "OSS_MSG", in SOLMAN in must show NONE, in Managed system it must show "BACK" RFC to your SOLMAN system.
Please check
Regards
Elena