"On the other hand. so does the BVision to. (not working)
The screen goes black, it shows perfect for 10 sec and locks up..."
You have the Amiga connected and working with a 15 Khz monitor in PAL?
If you start in this way, you have the opportunity to TEST ONLY the new CGX modes (without saving anything).
In few words you should start with 2 monitors connected.
1 on the original AmigaRGB output and the other (a SVGA) connected to the BVision.
Then start the required installation. First the install from the CD and then the 4.3 upgrade (rc5 will be enough)