Another BIG Problem

i think i am in a big dilemma now… i upgraded my firmware from BCDC to BCHC & then back to BCDC (downloaded from internet) … now, it seems this is giving me even greater problem… it does not let me upgrade back to BCHC

Try to flash with BQFlasher!
And try the firmware download from here:

Caution: this is a modified (region-free) firmware!
You will use your guarantee by flashing your drive with this on!