Configuring for cross-server FTP--SpringLoops

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I'm not too experienced with server admin stuff, etc., particularly with Plesk, but I'm trying to use a service, SpringLoops, where they host subversion repositories and they have a very nice service called 'Deploy' that exports and FTPs any modified/new files in your repository to a specified FTP or SFTP account. It runs fine for all my projects with the exception of the dedicated server. The error messages I receive from SpringLoops are a bit obscure, but I have a feeling it's some kind of permissions problem. Does anyone know the proper steps I need to take to allow this service to run smoothly? According to my server, I'm not applying any limits to my FTP accounts. Anyone have any ideas? Thanks...