well, i know this is an older post, but thought i'd pitch in anyway - the message you are getting indicates that you've got SCV (secure client verification) enabled, and that the client isn't meeting the criteria for being considered 'secure'. Depending on how you have it setup, that could be anything from not having a valid antivirus installed, to allowing ip forwarding, etc.
First thing to do is to disable your SCV checking and go from there.
