Black and White Images Exporting as all Black

[delaneyk49707347]

I am exporting my black and white images as normal and they look fine in Lightroom but once exported, they are all black. 

[Bill Sprague]

That is obviously not how it is supposed to work, but you've not offered enough information for trying to find a solution.  Can you start by posting a screen shot of your export settings?

[delaneyk49707347]

These are my export settings and I haven't changed them from what I normally do