For directory exclusion in the ZIP Files action, the mask must include the directory path as it would appear in the zip file after the zip operation concludes (i.e., /_Folder2/.svn, etc.).
Also, the 3rd party ZIP component used by the ZIP Files action appears to have problems excluding folder names containing dots.
You could use the Copy Files action to copy the desired files to a temp folder (since it doesn't have the above limitations) and then ZIP that folder without exclusions.
Another option might be to use the 7-Zip action.
http://www.kinook.com/VisBuildPro/Manual/7zip.htm