hard drive access light not working

I installed the brand new motherboard MSI K87 Neo2 Platinum in my computer having three IDE hard drives (two drives master-slave on one IDE connector) and one drive alone through PCI IDE card. Second IDE connector connects DVD-RW and CD/RW as master-slave. No RAID, no SATA drives present. All drives are recognized fine by BIOS, computer works fine, power indicator works, but hard drive access light does not work. I tried to flip light connector to motherboard pins, but it did not help. BIOS flushed with the latest version. Same light connector and same hard drives worked fine on the old failed motherboard. Any ideas/suggestions how to make hard drive access indicator work? Many thanks for help.