Up-to-date check failing

[Aurelian Melinte <amelinte@ALIS.COM>]

hello,

I am trying to commit some changes and I constantly get the following:

 -> Sending file `index.wml' to server
S-> checkout (/cvs/webwml/webwml/romanian/index.wml,v, 1.3, , (function))
cvs server: Up-to-date check failed for `index.wml'
cvs [server aborted]: correct above errors first!

That happens for any file I am trying. What exactly is the problem, what do 
I have to correct?
Thanks,

A.