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You requested a profile with distance as the X-axis and altitude as the Y-axis. Unfortunately, your input data does not contain sufficient information to plot those parameters.
If you need altitude data, try enabling the "Add SRTM elevation data" option in the profile input form.
Anyhow, I found some basic information about the route's elevation here:
http://www.geocodezip.com/v3_elevation-profile_distance.html
It is fairly easy to use, by adding the key waypoints, which are markers in google maps sense and easy to manipulate.