Did you buy a WC or a captive bred one?
Wild caughts of RETF are notoriously hard to keep alive.
I have been able to keep just about every other frog alive and can not keep WC Red eyes alive. They are hard to get to eat ( soem eat a a little just not enough to sustain them for very long) most are riddled with parasites. Not to mention the threat of chytrid.
So if things dont work out let me know after the 15th I should have about 20 froglets ready to go ( captive bred)
What are you keeping him in? Feeding?