NetBeans CVS Client Issue

When I try to do any CVS actions, I get the error message:

cvs [server aborted]: This server does not allow legacy cvs clients to connect.

From TortoiseCVS info window:

CVS client version: Concurrent Versions System (CVSNT) 2.5.03 (Scorpio) Build 2382
CVS server version: Concurrent Versions System (CVSNT) 2.5.03 (Scorpio) Build 2354
SSH client version: TortoisePlink: Release 0.60

I'm running NetBeans 6.1. Is there anything that I can do to get the NetBeans CVS to work in this environment?