Validating app using validate in xcode - Errors found - Image provided - iphone

Question

I got 2 errors when I tried to validate my app with the appstore.
How could I solve this ?
The approach i took to upload my build;
When I set Build configuration to Ad Hoc it Archives correctly (and displays in Organizer), but when I set Build configuration to Release, the archive file doesn't get displayed in the organizer. I have a different question on this on SO, but haven't got any replies yet.
So I clicked on the archived file (which was obtained after I set the Build configuration to Ad Hoc), and clicked on Validate.
Here is the screen shot, can someone tell me what I should be doing to get rid of this error ?
NOTE: Actually I know why the 1st error occurred, but I have no clue why the 2nd one occurred, and need guidance to solve it

Answer 1

SOLUTION TO ERROR-1:
Make sure your app icon is added to your project bundle and Also it is exactly 57 x 57 pixels PNG image.
SOLUTION TO ERROR-2:
Make sure you have set the Distribution Certificate and not Development Certificate in both Project and Target Settings.
You need to cross check it.
Also please cross check whether you are archiving the correct scheme, which you are setting the Distribution Certificate for.
EDIT FOR PRIVATE KEY ISSUE:
I have found louie's answer from the link iPhone app signing: A valid signing identity matching this profile could not be found in your keychain which was helpful to me once with same private key issue:
Here is what Louie's answer is:
I had the same problem: I first downloaded my certificates to my small
MacBook while on the run. When trying to install the certificates on
my iMac... then I ran into the problems described on this page.
After spending hours pulling my hair out like many of you, I performed
the following steps to fix it:
Close all your stuff except your webpage that should be logged into
App Dev center.
Open Xcode. Click WINDOW > ORGANIZER > select "Provisioning Profiles"
on the left. That should bring up your provisioning profiles.
Highlight one by one (if more than 1), right click and delete profile.
Yes, just do it! Delete them all! (I kept making a new one after a new
one trying to make the thing work.)
From the first page you see after logging into the App Dev Center on
the right side click "iOS PROVISIONING PORTAL" > (do not "launch
assistant"). Instead click on the left side. Select CERTIFICATES. You
will probably have just one line listed with your name/company - from
there click on the right side REVOKE. Click OK to verify that's what
you want to do.
On the same page click DEVICES. Click the box next to your device you
are trying to provision and click REMOVE SELECTED. Again click OK to
verify.
Wait about 2 minutes to let Apple do their thing.
Now click on "HOME" that is on the left side navigation.
Click "Launch Assistant"
create a new app ID - call it whatever you want. Just make sure it's
unique enough to know that's the one you just created because the
others you've been messing with all day will not be deleted from
Apples Dev Center.
You should be able to follow the rest of the Assistant without
troubles -- the main thing is you just had to delete your old
provision profiles and start over.
Hope this helps you.

Answer 2

Well... Your screenshot says that you have some problem with your icon and codesign verification.
Icon should be 57x57 pixel, put in your app bundle, correctly added to your target membership and set in your info.plist.
Then you need an iPhone Distribution Certificate from iOS Provisioning Portal.
If you checked icon and certificate and everything it's OK, maybe it is a problem in your uplader: I had same problem in the past (my icon was in my app bundle, but uploader wasn't recognizing it). Try software update to get latest uploader.