Difficulties With Exporting

After completing the final editing of my thriller opening, I needed to export it and publish it on to the Internet to be able to include it on the blog, as well as allow my peers to review it and give me constructive feedback.

However, an error warning kept appearing every time I tried to export it from iMovie (I was advised to first export it from Adobe Premier Pro, then import it into iMovie, then export it as iMovie allows the footage to be exported as a smaller file size to better suit its Internet purposes). I was unable to resolve this, but will be persistent and keep trying to export it as it is vital that the final cut be on the Internet.