cvs [commit aborted]: cannot commit files as 'root'

[Crosby]

                 Hello !
 I'm a beginner user of CVS and I don't know to resolve this error.I've
setup a CVS server (I use SuSE Linux 6.3) and I am always logged as root. I've
import a project but I can't commit the work. The error received is :

cvs [commit aborted]: cannot commit files as 'root'

 What should I do ?

Thanks !

Crosby