#2 Cannot access cvs using TortoiseCVS

[the*butler]

I get the following error:

In C:\Projects\q2pb: "C:\Program
Files\TortoiseCVS\cvs.exe" "checkout" "-P" "/game"
CVSROOT=:ext:smitade@q2pb.cvs.sourceforge.net:/cvsroot/q2pb

ext protocol library is missing entry pointcvs
[checkout aborted]: the :ext: access method is not
available on this system

Error, CVS operation failed

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I have SSH keys loaded via pageant.