Sometimes BlackBerry days go like that. That's how I learned BlackBerry. Wasting my days away messing around with it, searching these forums, trying this and that. If you search around for a while you'd find a thread about completely uninstalling Desktop Manager and reinstalling it. That might be what is necessary. However, if you've spent that much time on it today it would probably be best to start fresh tomorrow.
Get a good night's sleep and try again tomorrow or give it a few days and come back to it. Sometimes I get where I want to throw the thing at the wall. That's when it's time to be done!
Been there. Done that.