Signer not valid error

Question

I\'ve created an ad hoc build of my app and would like another person to install it. I have their device ID (two actually) in the provisioning profile. My certificate is t

Answer 1

I got same problem two times ( xcode 4.2 ios 5)

1st,time i forgot to add armv6 in architecture

2nd, time i have created to many provisioning files with same developer id that i should delete others key-chain according to use of bundle identifier ...and i mistakenly deleted valid and used other kechain