Cannot negotiate authentication mechanisim

So this works fine for me from Linux and TortioseSVN, but from
Windows/Cygwin when I try to check out my repo
(svn://svn.synfin.net/tcpreplay) I get an error "svn: Cannot negotiate
authentication mechanisim". I'm using SASL auth on the backend...

Anyone know what the solution is? Some issue with how the Cygwin svn
binaries are compiled, or???

Thanks.

-- 
Aaron Turner
http://synfin.net/         Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
    -- Benjamin Franklin
"carpe diem quam minimum credula postero"