I started to create SVGs with Inkscape some days ago, and i have a problem with texts. During the work in Inkscape everything is okay, but when I open my images in a browser (tested IE9 and Chrome) the text is missing. The rest of the image looks as it should look, its just the text.
I probably just made some stupid beginners mistake, but i have no idea which

I attached a file as an example, help would be very much appreciated.