WSUS 3 SP1 does not download XP Service Pack 3

We have recently installed WSUS 3 on Windows Server 2003 english enterprise SP2, The problem is that windows xp Service pack 3 has not get downloaded. I have checked out the updates and i don't see it there as well. I am not sure if i am missing out anything as i haven't used WSUS 3 previously. Any help regrading this issue will be appreciated.

I think you might have not selected "Service Packs" in Options | Products and Classifications, if it is so then just select it and windows xp Service pack 3 will get downloaded without any further issues, bets of luck. Feel free to ask if you have any query further.