Help with TFT LCD 3.6" OR 3.5"

OK Thanks,
In "Touch_shield_kbv.ino" I find how to change the font.

Now I try to read a file from the SD card,
With code "ShowBMP_kbv_as7" not successful.
Get a message that identifies the card, with Blue screen.

" Show BMP files on TFT with ID:0x1581
cannot start SD "

where is the problem?

Thanks.