Hiiiii,
In my office I have installed 2003 server sp1 standard edition.In another system I have installed 2003 server sp2.I have purchased kaspersky antivirus for server especially for server.its working in sp2 but its not working in sp1 its working in sp2.is there any antivirus for 2003 server sp1.presently I installed mcafee.but its not working properly.I can't buy another antivirus.if there is any solution *** help me out.

Yep, simple really.
Patch the sp1 machine to sp2

There is an anti-virus for free non-commercial version which is Avira and its very helpful :)
Here is the link http://www.filehippo.com/download_antivir/
I hope this help you :)

This is a SERVER we are talking about here, not a normal desktop system.

sorry, I did not focus the word "server", I was focusing on SP2 for desktop.
Yeah I agree with Curlyben :)
Go update with 2003 server sp2
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=95ac1610-c232-4644-b828-c55eec605d5

Yes thanq but how to upgrade sp1 to sp2. *** helpme out from this problem u will be very helpful tome

It's not an upgrade.
Just use the normal Windows Updates/
Sounds like you'll have more than just SP2 to put on it anyway.

It's always good practice to keep your machines fully patched.