I tried utilizing my FL300 as a remote slave flash with my EP3 today. Flash fired OK, but all my shots were severely underexposed, even when I compensated to +3 stops. I thought I'd make sure my flash setting was on full, rather than fill, but for some reason I can't get it set to Full. Its grayed out in all modes (P, A, S). In some setups (for Stellar Jays) the FL300 was only four feet from the subject, yet still was weak. ISO I used was from 800 up to 2000. Yes, I made sure the slave was firing. Any help would be appreciated. I'm hoping I missed a setting somewhere.