Black Composite Channel is Invisible

[Janwinard]

I converted my image in cmyk to do color halftone for screen printing. I go to Channel and check every CMYK layer. Composite Cyan, Composite Magenta and Composite Yellow are visible but the composite Black and Alpha are invisible? How do I print every available channels if others are not visible?

[Dan C]

Hi Janwinard,
 

Apologies for the delayed response here, we are currently working to upgrade our servers and this has only just come to our attention.
May I ask how you converted your image to CMYK? I have used Document > Colour Format > CMYK (8 Bit), then disabled and enabled all composites one by one, and each is working as expected.
Could you please provide me with the .afphoto file you are working on, so I can take a look into this?