You'll have to give a bit more information. Perhaps a Hype document so we can see what you're doing.
It could be that you have a element inside a group. Or a graphic that is bigger than the element it's in. If you've used the built in Hype Mouse Click action then it should show a pointer over the entire size of the element.
Or perhaps you have something else covering most / part of the element with the link. If this is the case you can use the check box to "ignore all pointer events" on the covering element(s).