I'm trying to create a button in my iPhone app that will send the user to another app on the App Store, but I can't get it to work. I know that I'm supposed to use a NSURL, but it opens the App Store and says "Your request could not be completed". I retrieved the url by going to iTunes and copying it, but I found a url that I used in a previous app that does work. I forgot how I got it, but it is http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=330435914&mt=8 compared to http://phobos.apple.com/us/app/x-ball/id330435914?mt=8 Since the first one works, I tried using in to link to other apps by replacing the id but those don't work. Does anyone know why? Thanks in advance!