If you are using WSPBuilder and you just got the following error

Microsoft SharePoint Services Administration is not running on  <Server Name>

It is due to the fact that the service "Windows SharePoint Services Administration" is not running. 

In order to fix this go to -> Start -> Run  -> services.msc

When the services window opens up just go and start the service.  I also recommend setting the service startup to automatic.

Hope this helps someone other than myself.