changed the orig Theme img’es with my own but they don’t show up

Hi,

I changed the pictures that came with the theme with my own.
I resized them so that the width is the same but put a smaller height.
I uploaded the pictures but they don’t show on the blog.
I looked in the stylesheet but there seems no section where the height might be defined. I checked the header.php aswell. I think it should work bu tit doesn’t.
This drives me nuts as every time something doesn’t work there is no answer in the codex. It isn’t really a helpful source.
https://music.junemoris.com

Any help more then welcome <(