4.0b2 is the latest r4 firmware yes... and seing the way you act I think its the one you have used 
Also , you're saying that they aren't being recognized. you must be doing something wrong because if they didn't work it would say they are corrupt , which isn't the case.
Also , you're saying that they aren't being recognized. you must be doing something wrong because if they didn't work it would say they are corrupt , which isn't the case.
