Images have wrong URL

Hello..

I am having this issue with my images:
I upload the images, and it shows perfectly in the FTP, media editor and page editor.

The URL is /Wordpress/wp-content/uploads/2014/05/
and it is so both in the FTP and the page editor.

However, when I publish it, and hover over the alt-text (hyperlink) appearing instead of the actual image, the URL changes to:

/WordPress/wp-content/uploads/2014/05/ (Notice the capital P)

This prevents my image from being shown.

What the heck is this happening, and how do I fix it?

Thanks in advance.