Please see how to report bugs. Typically we cannot do anything about reports like this because you have not provided your .capx or at least an exported version of the project.
Construct 2 does not export, nor do any browsers support playing, .wav files. So I think it is highly unlikely that is the real solution.
Please also note from here:
lease allow 24 hours for a response. Replying with "can't anyone help?" after 20 minutes could be misconstrued as rudeness, since it is impossible all our forum visitors could have checked the thread in that time. If you're seeing a lot of views and no replies, don't forget we commonly have more search crawlers (e.g. Google) indexing the site than real users, so the views count may be inflated.
Some emphasis added.