Hi Sathish,
The error message in the screenshot is just the last line of the exception, it's not the full exception. Please post the full Java exception (usually a stack trace with a lot of indented lines) from the log file of the RA agent. That might give a clue (possibly).
Is your RA agent on UNIX or Linux? If so, you can use "tail -F /path/to/logfile" in a shell, and that way, the relevant exception messages should be printed at the exact moment you try the connection in UC4.
Best,
Carsten