Unable top purchase at your online store

Hi randall and team,All afternoon i have been trying to buy the 747X. Each time i get to the submit page it returns with an internal error. This is the case regardless of which credit card i use. Are you aware of any problems aside from the amex issue which you mentioned in a reply to a post by manny.I have tried with visa too and get a different message "host not found" or somethinglike that.Anyway im realy excited about flying the 747X as soon as i can. id appreciate any advice/comments.ThanksNicholas Boskovic