Cert issues: package for release. Am I being silly?

So, I want to package an iOS / AIR app for release, all is good until I get to uploading when I see the error:

"The executable <asdasd> must be signed with the certificate that is contained in the provisioning profile."

I am guessing that means that I have to use the distribution cert that is in my developer.apple page?

Except...

That offers no option to set password etc and Flash Builder won't compile without a password... (yes, that means I used the wrong cert to compile originally... :$).

Can anybody point me in the right direction?

Thanks,

G