Unable to extract codesigning entitlements from your application

I get this error in a FB4.6 (win xp & osx lion) project after trying to submit it via the Apple Application Loader: "Unable to extract codesigning entitlements from your application"

I get this error in a FB4.5 (win 7) project after trying to submit it via the Apple Application Loader: "Application failed codesign verification. The signature was invalid, or it was not signed with and iPhone Distribution Certificate".

I cannot get this to work.

I'd like to ask anybody that has some expierence with submitting apps to the appstore to tell me if I am missing something:

• Create appID in provisioning portal.
• In itunes connect, create the app with that appID.
• Use apple keychain to create certificate request
• Upload certificate request to provisioning portal to generate a "distribution certificate". Download this certificate.
• Create a "Distribution provisioning profile" for the appID, set it to "app store". Download this profile.
• import "distribution certificate" into Keychain, export a .p12 file with a password.
• in de .xml of the application, the <id> </id> should have the App_id withouth the random numbers.
• Do a release build, use the ".p12" file with the password and the "Distirbution provisioning profile"
• Build and wait 5 minutes. Get some coffee even. Pet and feed our office cats.
• Use the "Apple Application Loader" software that comes with xCode to upload the file.
• Errors!

Note: I use OSX Lion on a Virtual machine and transfer the files back and forth over the network to win7 (where I have Flash Builder)

What am I missing?