Uploading Trial Fonts

Hi community,

I'm trying to test a trial font - I want to use it for the headers and titles. After uploading through the custom css I saw small changes to the font the was originally there but the font is not the font I uploaded what so ever. I tested the font on Illustrator and Photoshop and it works just fine, so I don't know what it could be. Any ideas or suggestions for what I can do?

Thanks all, 

K.