WINDOWS2003 ENTER PRISE SERVER

HI,

I AM SIVANANDURI. I HAVE ONE SITUATION AND THAT IS I AM GETTING IPADDRESS FOLLOWED BY ADMINISTRATOR NAME IN LOGIN SCREEN OF MY SERVER. WHAT COULD BE THE REASON FOR THAT AND PLEASE TELL ME THE RESOLUTION.

BEST REGARDS,
N.V.L.N.SIVARAMAKRISHNA.