Personally if it were my server, I would wipe that system clean and build it all up fresh so that there is no chance of anything left behind by a hacker that is overlooked vs trying to plug all the holes that a hacker created and not finding them all and then getting back in.
Question i have is.... is this Windows 2003 Server a purchased copy or a copy downloaded for free. Reason why i ask is because I have heard of some nasty/dirty bootlegged ISOs on the web in torrents that are not clean and hackers put these up for use with a their backdoors already a part of the installation files and many of them rooted with root kits, some even not even requiring key activation, and even some built off of the Server 2003 Trial ISO that was available back in the day that was cracked. If your using a boot legged copy of Windows 2003 Server, you will want to stop using it immediately and purchase a clean copy that is legal. Ebay is a good source for obsolete OS's. Just be sure to get it from a seller that has lots of positive feedback so that you dont buy a bootleg and end up in the same mess.
I use to set up Server 2000 honeypots and set them up to get attacked and then take them offline after and see what surprises and goodie tools etc hackers left on them to better understand what tools are out there in use and stay up on security by intentionally getting honeypots infected to see what tools are in use by black and grey hats.
this is a good copy genuine one and about ur advice fully agree but can't lose data and many things there so
my last news is after trying and trying my last status now is online
i used this link
http://www.yougetsignal.com/tools/open-ports/ to know if port 3389 is working online or not cuz locally i can access the server but online can't so
everytime see this port closed by the link above and recently try re config with my router got open port
my router is TD-W8970
and start feel the problem from it, i don't know what i should do
to be sure where is the problem !
1 - server
2- router
3- config.
and firewall not our option cuz when i try i close it at all