@ericofmemphis, Eric, May need a good quality set of new batteries. Try this to clean the contacts on your flash one more time to ensure good contact. The best commonly available thing to clean the camera battery corroded contacts with is distilled vinegar and Q tip/cloth/small brush then very light polish with extra fine steel wool or an ink eraser on a pen, followed by a little 90% isopropyl alcohol on a clean cloth. Then dry the contacts with a dry clean cloth. You want to avoid using a cloth that will leave lint/dust behind. Finish by blowing out with a can of compressed air to get rid of any fibers or grit from polishing. Check the attached links dismantling and cleaning, instruction and guides, Good luck.
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Awesome!!!! Rubbing Alcohol & Vinegar Worked great on my SB-5000.
I used rubbing alcohol and vinegar as well on my SB-700 along with pencil eraser and Q-Tips...It cleaned up the corroded contact
из John Val