Working with CodePlex. How to save password for project?

I want to make public one small project on CodePlex. Everybody knows that you can work with CodePlex like with TFS client and with SVN client as well. But really I can’t work with it from SVN client. When I tried to add some binary file (it was dll) I got the error “Server sent unexpected return value (200 OK) in response to PUT request for …”. How to solve this problem I don’t know, I found thread at CodePlex's discussions Can't commit binary files using TortoiseSVN, but last message was at past year. O...