remote desktop from home pc to offcie 2003 servers

Hello,
I am trying to connect my XPP 64bit home machine through remote desktop to my servers, 2003 enterprise, at the office using the admin username and password for the servers & keep on receiving the following error mesage: “The local policy of this system does not allow you to log on interactively”.
I can find nothing in GPO’s or Local SecPol restricting me and I am able to conect from other machines, ie my mac book pro but I dont always have that here so need to enable this machine to do this.
Can anyone point me in the right direction to resolve this please?
Any help very much appreciated.
Kind regards, Damian.