Opening iTunes link on iPhone app? [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

How to link to apps on the app store

I want to link all my apps on my main app if that makes sense So i have a button, when the user touches it

they will be directed to this link:

http://itunes.apple.com/gb/app/idubstep/id430260356?mt=8

However

 -(IBAction)goReviewTwo:(id)sender
{
  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://itunes.apple.com/gb/artist/lifevision-studios/id415139916"]];
}

This always say Request cannot be complete. So is there a special link i nee开发者_开发技巧d to use for it?

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There are several threads answering this question. Here is one: thread

Note the comment that suggests using itms:// instead of http://