Hi Bala,
Actually when you submit in a few sites, if the website has a web reference set to CommunityCredit.com, then you need not manually submit the credits in AddPoints.aspx.
When you actually submit the message, a copy would get submitted across to CommunityCredit and you earn points. But Dotnetspider currently does not seem to support this though.
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Deepak K Vasudevan
Architect
http://deepakvasudevan.blogspot.com/
http://www.lavanyadeepak.tk/