you could try flashing the recovery through fastboot
"fastboot flash recovery recovery.img" (make sure the recovery file you download for your phone is put into the platform-tools folder.)
or you can try this method ---> TeamWin Projects - TWRP 2.6 - Samsung Galaxy S4 (AT&T) | TeamWin
"If money is your hope for independence you will never have it. The only real security that a man will have in this world is a reserve of knowledge, experience, and ability."