I think bbobb was saying that it is hard to tell what the problem really is since you didn't post a detailed error log, or turn off custom errors. Sure he, or someone, could tell you how to delete the post, but that might not solve the issue that caused the problem in the first place, leading to more
errors. Edit your web.config and turn custom errors to Off, instead of On, and then go to the post again, paste the results here. Make sure to turn
custom errors back On when you finish.