git cvsimport problem

Hi

I want to import a cvs project , here's what I do :

1)  cvs check out
2) $ cd cvs-pro
3) cvs-pro$ git cvsimport -C path/to/destination -v

it starts executing but finally stops with the following error:
git-cvsimport: fatal: cvsps reported error


what is the problem ?
Am I doing anything wrong ?

Thanks in advance for your help .

Alenoosh