Thanks SirDice.
You meant to say some program from my machine trying to make connection to the other machine at port 4005. If that's the case then, what I can't able to understand which program is it? and why it is using different ports on my system to connect to other.
Please look at the second page of the attachment. I ran netstat -bv the other day when I've got the same issue. I can't able to understand in detail what's happening. You might able to explain it to me.

Cheers