ROM Hack ROM Loading Failed!

[xXHazelXx]

hiya, I'm really new to the whole dstt thing but i recently purchased one off a friend, he loaded all my games on for me and it was all working fine.
But just now, I took out the tt and turned my ds back on so i could adjust the calibration, turned it back off and inserted the card and turned it back on to play again but when i pressed on a game it came up with a little black screen with "rom loading failed ttmenu.sys error please reset system."

does anyone know how i can get it to work again?

thanks xx

 

[Son of Science]

try reinstalling the firmware