I just purchased an fl-600r. When set as a wireless slave to the omd clip on flash, ve noticed that after a few shots, everything becomes severely underexposed. When i turn the flash on and off. Its back to normal again. Any thoughts? Im using energizer lithium batteries. Camera is set to A. Flash is set to TTL. Edit: I was using slave mode, when I should have been using RC....Things are as they should be.