From eScan Wiki
If AV for SMB ( awn2k3smk.exe ) trying to install on windows 2003 server or windows 2003 SBS server, It never ask whether to make that system client or server....
Solution:
- Uninstall eScan from that system.
- Download esremove.exe (click here to download)
- Run this file on that system by double clicking it.
- Once this exe is finished it will give message saying that "eScan" removed successfully".
- Then install the awn2k3smk.exe again.
- This should resolve the problem. If not please report this to qa@mwti.net with full details and logs.