Imovie 11 Won't Export

So i have made a project on Imovie 11 and it won't export. I have no idea what the problem is but every time I try to export to quicktime its gives me and error and when I try to export to YouTube or as a movie file it won't export comming up with the "heap zone" error. I know that some of you will say "try to lower the resolution" or "split the movie in two" but it is only 5 minutes long, it contains no video only pictures voice overs and music from itunes, and it has some special effects with the picture color (hard light) and the globe effect where it shows the travel from one point to another on a globe.