I had a very similar problem. I believe it was because I tried to format the sd card to NTFS xD silly me...
I think that what I did was:
1. put CWM recovery in that image directory, but I had previously rooted my phone so I don't know if this will work for you (i'm a hopeless noob)
2. then I think I managed to boot into CWM recovery but if it doesn't work for you, disregard the following :/
3. do all the wipes and flash a stock/custom ROM from the sd card like usual (by usual I mean, like it says on every custom ROM thread)
worked fine afterwards, hope yours will too ;)
EDIT: also, I only posted this for possible future reference for noobs like me that might come along