dstt fault

as i start uo harry potter and the half blood prins (nds)come this into the screen[ROM LOADING FAILED]DISK ERRCODE=-81
PLEASE RESET SYSTEMWHAT IS THIS ???OHH YESI HAVE DSTT VERSION 1.17
NDS LITE

if other games work then the rom is incompatible. See if there is a firmware update for your flashcart, if not, then you need to wait for one.

1.17 is the latest firmware. http://www.linfoxdomain.com/nintendo/ds/

actually...I think the problem has to do with your MicroSD card...try reformatting and try booting up the game again...I got the same error when trying to play Super Robot Taisen, too...