Start eJabbered before server login

Hi everyone,
I've recently installed eJabberd on my server running Windows Server 2008 R2. However, I notice the eJabberd server can only be started once logged in (I created a batch file to invoke the startup).

However, I would like to start the eJabberd server before login (at startup). Is there any way of doing this? I was thinking a startup script in Group Policy, but this doesn't seem to work.

Many thanks
Jon