Accessibility values on DataGridViewCell checkbox.

When I set the ReadOnly property on a data grid view cell, I need to know that the cell is Read Only via Accessibility tools (such as INSPECT Active Accessibility Object Inspector).

Currently this is not reporting that the cell is Read Only when it is (which is in violation of 508 compliance standards).

I've tried a couple work-arounds but it's not working.

Is this a known issue or am I missing something?

Thanks.

Chris