...........without knowing error?? It would take a magician....

I can only suppose some things......

You unlocked the car's device ??
No unlocked....you have at last renamed the executable and iGo_Primo_2.4_xxxxx folder as than that the original software?

In more ..... you put map/maps in CONTENT >> MAP << folder ??

Blaupunkt NY 830 has 800x480 resolution, while the software data is multiresolution.
So you need to insert into Sys.Txt, the correct strings :

[interface]
resolution_dir=800_480

[rawdisplay]
screen_x=800
screen_y=480

And sorry for my bad English !