GOT IT !!
Using gfxroute on Aminet
http://aminet.net/package/util/misc/gfxroute
and typing "gfxroute bitmap chip" it is working now with CyberBugFixAga
I am using his fblit config too. Edit: Not necessary
I have to investigate because I've got to open first the OCS version to get the AGA one working right. Edit: Not any more.