Ok i understood no one can help... but i make some tests and i report my results
If i check the flag auto mount under hdtoolbox the 68k side fail yellow guru and some time ramlib crashes.
The Os3.9 become really SLOOOW and unstable.
The Sysspeed report the 060 /50 is 1,92 mips
I have to enter to hdtoolbox uncheck the automount of swap ... boot the machine after entering in os4.1 i have to check this flag on in media tool box reboot and the swap start working...
Probably is a DMA problem?.....