Are you sure you copied the exact name of the file? Are you sure you put it in the correct field (image field)?
Can we have a link to this?
(Also, I highly suggest getting your email confirmed, maybe by going to Special:Confirmemail?)
Generally, it's best to ask local admins about templates, since they're likely ones that made them and/or know how they work.
In this case, the template requires you to put in the whole image insertion code (documentation is falsely saying that it needs only a filename).