On Windows 7 the 10.11 OSX HD invisible/not bootable

Hi

I have Probs to boot back from windows 7 to EL Capitan 10.11.

Bootcamp only shows me my different Boot Volumes from

10.6, 10.7, 10.9 and 10.10 Yosemite.

Which i can boot without a problem.

Only the new SSD with 10.11 on it won´t show up !

So I only could but back to 10.10 and after boot to 10.11.

Mac Pro (3.1) 2.8 Ghz 8-Cores 16GB 5HDs 1SSD

Thanks in advance for any Help !

regards

Stefan