sysvol folders empty

I have two domain controllers…a1(server 2k) and a2(server 2k3. Both sysvol folders are empty, no scripts are located within, only more folders that are also empty. I would like to know if this is the reason why I am having login issues when one of the domain controllers goes down, and I would like to know if anyone knows of a good manual or website that explains how to create a logon scripts for roaming profiles.