Graphics in Question Description

I have something weird here. I insert a graphic into the question description. I try to put in the full URL, but it corrects it to the relavtive URL:

images/authcontin.png

The graphic is really located at: http://www.roi-ally.com/images/authcontin.png

However, in the survey, it is using this URL: http://www.roi-ally.com/index.php/en/images/authcontin.png which does not work.

Is there either a way to use the full URL or have it determine the relative one correctly?

Thanks!