Can't boot to Windows partition on Macbook 9,1 (Mid 2012)

[hipur]

I've installed Windows 8.1 to my Macbook Pro 15 mid 2012 via legacy mode, all went ok. It was installed to disk1s1 (HDD in optical bay), my OS X 10.11 sits in my SSD (disk0) on the main bay.

Disk1s2 is a data partition.

I can see the Windows drive if I press alt during EFI boot, but when I try to boot it, says:

No bootable device -- insert disk and press any key

My HDD is MBR and my SSD is GPT.

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *250.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Macintosh SSD           249.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *500.1 GB   disk1
   1:               Windows_NTFS Untitled                128.0 GB   disk1s1
   2:                  Apple_HFS FCBD                    372.1 GB   disk1s2
/dev/disk2 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh SSD          +248.8 GB   disk2

If I remove my SSD, Windows boots normally and I can work all day.

How to boot with both drives connected?