I have what may be the same problem. When you say "it works using putty without problems" do you mean using plink instead of TortoisePlink?
If you use TortoisePlink from the command line, does it work? For me: - I am only using a key pair. - I can get it working with a Subversion command line tool. - Neither plink nor TortoisePlink work (configured in TortoiseSVN network settings). - When using TortoisePlink on the command line with the same options as I configured in the TortoiseSVN network settings, I get a sane response. -- You received this message because you are subscribed to the Google Groups "TortoiseSVN" group. To unsubscribe from this group and stop receiving emails from it, send an email to tortoisesvn+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tortoisesvn/bf279d55-79e6-4e36-86bb-9e2b0f155f0e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.