Why disks will not spin down

Hi all,

I have a ReadyNas Pro4 with two WD Red 3TB disks that will not spin down if LHS is enabled.

It is running LHS 7.7.2, i686-linux
Perl-version: 5.8.8 - i486-linux-gnu-thread-multi
Database Version: DBD::SQLite 1.34_01 (sqlite 3.7.7.1)

What should I do?

Thank's in advance for any help with troubleshooting this - much appreciated!

Edit: I tried disabling all plugins and now disks go to sleep.. I will now try enabling them one at a time..