homelite hedge trimmer engine bolts are loose!?

It seems my hedge trimmer is constantly shaking itself apart. The bolts which attach the crankcase together keep working themselves loose. Also, the bolts which attach the cylinder to the crankcase get loose. This is in addition to the bolts which hold on the carburator which also get loose. I've taken apart the trimmer and re-assembled using loctite thread lock, but the problem persists after just using 4 tanks of fuel. How can I stop this from happening?