[cvsnt] Upgrading from CVSNT 2.0.51 to 2.5.03 - Error reading from server... etc

[Tim Chippington Derrick]

Hi

I have been running CVSNT 2.0.51 servers on three different machines 
without problems for months, but recently needed to look at updating 
the server version for project reasons. I have updated just one of 
the machines (my own laptop with XP Pro SP2) for a test and now I 
just keep getting the error message below whatever I try to access 
the new CVSNT server, but I can still access the other two 2.0.51 
servers fine through the command line, WinCVS or TortoiseCVS. Just on 
the updated server machine I get this error message with both the 
console command line versions (and I have checked cvs --ver to make 
sure I use the right cvs.exe) and via WinCVS:

c:\users\tim>cvs -d :pserver:tim at timlaptop:2401:/main login
Logging in to :pserver:tim at timlaptop:2401:/main
CVS Password:
cvs [login aborted]: Error reading from server timlaptop: 0: No such 
file or directory

That was of course using pserver. If instead I try to use sspi, I get 
this instead:

c:\users\tim>cvs -d :sspi:localhost:/main login
Logging in to :sspi:Tim at localhost:2401:/main
CVS Password:
Can't authenticate - server and client cannot agree on an 
authentication scheme (got '')

I followed the advice on http://www.cvsnt.org/wiki/Upgrading which 
suggests just installing over the top of an existing 2.x CVSNT server 
installation. I have also read through 
http://web.telia.com/~u86216177/InstallCVSNT25.html and am still 
having problems. I have looked back in the CVSNT list and didn't yet 
find any other clues there either...

What am I doing wrong? What have I missed?