Can you post a screenshot of your publishing settings?
Test: Click the test button, do you get an error? If so, post a screenshot of the error.
Browse: If the test is okay, then clear out the path field and click the browse button. It should connect to your server and allow you to browse for the correct folder to publish to. Select the correct folder. If you get an error when browsing, post it.
If both test and browse work, then try publishing again.