connection to pserver through proxy with user authentication

[Martin Roehrig]

Hi,

I would like to connect to a cvs pserver outside in the world and have to go 
through our proxy. The proxy wants my username and
password.

I have tried that with WinCVS 1.3b8 (with the appropriate proxy settings in the 
preferences tab) and always got:
  cvs [login aborted]: connect to 
cvs.proftp.sourceforge.net(usw-pr-cvs.sourceforge.net):2401 failed:
  *****CVS exited normally with code 1*****

I've searched the CVS and CVSGUI mailing lists and WinCVS.org, but I still 
haven't found out whether it is possible at all to go
through a proxy with user authentication using WinCVS.

Maybe someone could tell me that?

Or do you know any other cvs client (on Windows or Linux) which is able to 
connect to a cvs pserver through a proxy that requires
user/password authentication?

Many thanks in advance
Martin


P.S.
As you see above I know that there is a mailing list especially for WinCVS. 
Nevertheless I post my question here because WinCVS is
only my starting point and I would be glad about any cvs client on Windows or 
Linux with the feature mentioned above and because I
don't like Yahoo's give-us-your-personal-data-before-you-are-allowed-to-post 
and we-will-log-everything-you-do-here policies. I hope
you don't mind.