try to re-enable bd, but still it didn't working ? it said 'BD-ROM emulator couldn't start' ??
Update: it was working, I read all the information about 4.41 CFW and also information about MultiMan 4.40 very carefully , then I realized I miss one step as recommendation to make it working with MM 4.40, there was missing one step 4.41.1 Lite CFW.
so, I tried to install 4.41.1 Lite again after backup then install 4.41.2 Lite and then install MM 4.40 again, the BDrom working perfectly without re-enable it.