Trying to reflash from sd but bootloader stays at serial

[samg95]

Ive looked for a thread like this but couldnt find one. so I apoligize if it is a repeat.
I flashed to mighty rom 2 days
ago from my msd card(faster,and my
laptop is being fixed)now i am trying to re flash
and when i get to the bootloader screen it says setial.
I have no problem soft resetting to get my sprint tp
booted back to mighty rom 4.6 but i cant seem to
re flash. i,ve tried a couple of different roms also
but to no evail. I even re unlocked it...with no problem.
anyone have any suggestions.