Move your code into the Format event of the Detail section.
If the goal is to end up with a checked box for Yes and just white space for
No, you could also use this trick:
Check boxes on reports: change the size, color, unbox them,
and use conditional formatting
at:
http://allenbrowne.com/ser-52.html

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Allen Browne - Microsoft MVP. Perth, Western Australia.
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> Hello All
>
[quoted text clipped - 15 lines]
> Many thanks
> Leslie Isaacs