kids and comfort levels

So we have a project at kidnet where the children have to record their voices for a two minute audio file where hey talk about themselves with music in the background.  One of the students has a really hard time speaking in front of the mic, and stumbles and gets really shy.  All of the staff and i really tried to get them to do it, but in the end, she just is way too uncomfortable to do it.  It really made me wonder if we should really make her do it or not.  I mean, comfort level is a really vague line and I'm not sure if it's our job as educators to cross that line.

     I know that one of the most important aspects of education is to broaden horizons, and make kids do things they never expected to do.  However, there are also boundaries that we shouldn't cross, ånd some fears must be conquered personally and not within the realm of academics.  I'm just really trying to find that line, because I actually thought that the student shouldn't have been made to record her voice after about an hour of arguing.  She's going to have to conquer her fear at one point, but maybe that day wasn't the day.  I don't know tell me what you guys think:)