Problem with check box in continuous form

[David]

I've created a continuous tabular form with an added
check box field that initiates some automated text
insertion (via macro) when clicked. Strangely when I
click on one check box beside a record, every check box
lights up. The macro luckily only applies to the record
that I've chosen, but this obiously causes an ambiguity
that I'd like to correct.

Is this possible?

Thanks in advance.