problem with scan converter

[Totoro]

After I read the post of Ophtho on the Tview, I buy a TV Show (ABsoft). The Tview is not sell in france.

I connect R + G + B + Ground on the VGA15 on the Jpac and the Sync on the Jamma ( P )..

The sync is not very bad but not very stable.. the screen don't move   but at the bottom lines shake (or tremble ?? sorry for this bad english)  

the big problem is the colors!! they are very bad:
the white is white  
the black is BLUE  
and the R G B are grey!! and shifted of few pixels !!!

I have try to connect RGB + ground + sync directly on the Jamma, it's the same but with less luminosity...
My jamma cable is not connected on the video ground (14), but my cabinet works good with a jamma card... (good colors and sync)

If you know the solution, please help me!!

fred.