Shamiul, I am assuming you got this sorted, if so, could I ask you to post what you found and then mark that as the solution, so others will know what to try? If you are still trying to sort things out, the most helpful thing in these cases is generally to look over the Document/Script log:
This will give folks a bit more information in the log to try to pose theories... It may help you as well. My best hunch would be something in the Connector you were using though, or the connect to string needing other parameters etc.
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