Logo

Hi!
I have some problems with the settings of the template. First of all with the logo.
Which are the instructions to insert the logo?
I tried to use the “upload” button in the theme settings using different size (thinking the image will be resized automatically), but nothing. I tried to upload an image with the same height size of the frau logo (179px), but nothing. I tried to renamed the file as Frau logo, but nothing. I tried to upload the logo in the Image folder of the theme, but nothing.
What I have to do? I’m going crazy!
The server is Windows instead of Linux.
Thank you very much for helping me.

ps: I used this theme in the past, but I had no problem.