The resolution is too low to see what you are doing.
Page 17 of the manual shows the formats that MMM2015 can read. For video, they are avi, mxv (Magix format ) and wmv. If you are trying to import any other format, it won't work. You will have to convert it to a format that works. I suggest wmv unless you have a Magix video editor.
See my tutorial on using Movie Edit Pro with MMM under the tutorials tab.
Now that I can see what you are trying to do, if you already have the file in one of the accepted formats, then use the file browser in the Media pool, navigate to your file, and drag it on to a track. You have been using the wrong tool.