ActiveX Checkbox code not working

Hi everyone,

I'm fairly new to VBA, and I can't seem to get my code to work for these checkboxes. My spreadsheet is a sales quoting sheet, and the checkboxes are 3 additional options. They need to be enabled/disabled based on the response to a drop-down on a previous cell. I'll put the code I have below. I don't know if I'm not "activating" the code right, or if the code itself is wrong.

Please Login or Register  to view this content.

I attached my sheet, let me know if you don't see it. Thank you!!