Did you make sure that the material file is correctly coded to tie it to the jpg/png files?
Also, is it a fhp with someone else's name you download or a zip/rar with multiple files like jpg and material?
Please describe more, such as what the files are called and where you put them.
If you can supply me with the code from the material file, I can probably look into it..
Side note: Did you go on FeralHeart, clicked on Tools instead of logging in and selected Preset Maker?
The preset needs to be exported before it can be used. Therefore, also make sure your username is written in the logging in window.