How to program atmega2560 r3 with 3,5"tft for multiple pictures

I have tried this and i can see the picture building on the side line of the picture but it does not come on the screen
The examples are working as they should be nice in the middle and good
But wenn i try my BMP picture 320x480 24 bit colour it only moves on the side of the picture (3mm) and thats it

someone any suggestions?