ERROR: Unable to Download App

[Phil_P___Pete_]

HI All.

I'm moving my app from development to distribution.  I created a new certificate and a new provisioning.  I replaced the old adhoc certificate, changed the settings from using the adhoc provisioning to the distribution provisioning and did a full rebuild. No changes other than the distribution and provisioning were made.

The rebuild had no errors but when I try to install it doesn't... I get this error:

Anyone have any idea as what the issue may be?  Any good links on creating the correct distribution certificates?

Thanks,

Pete

[Phil_P___Pete_]

Magically, it has just installed on an iPad but still not the iPhone.... 

[PaulF_IntelCorp]

Sometimes you have to uninstall the old app on the device in order to get an update to install.