Ans,
I tried searching on that keywords and they always talk about askimet plugin. I have to admit that I was lazy enough to create wordpress ID and ask a question. BTW I host my site somewhere else not in wordpress server. I just use wordpress framework so I don't have userid unless I create it. BTW my site is about photography. If you want you can visit here.

Thanks for getting back to me.

Regards,
UM3$H