Also, your .cap file says it was made in a later version of Construct, even though I'm using the most up to date version from the website. Is there a beta out or something?
Oops! Sorry about that
Yes, there is a new unstable release out:
But even though it's labeled "unstable" it's actually pretty stable.
Anyway, here's your problem:
Your variable type is "Number." Set that to "Text" and you'll be good to go.