I need to upload an app. I have built to the app store. I've been following the walkthroughs and have got stuck on the bit when i download the distribution certificate.  

![enter image description here](https://i.stack.imgur.com/MTgjV.jpg)
my provisioning profile is listed under the provisioning profile column, ive just blanked it out. when i download the certificate, i double click it, keychain access opens and my certificate is listed in the 'certificates' tab, but not the 'my certificates' tab with no dropdown to show a private key has been created. Is there something Im missing? ive been through 4 different walkthroughs all saying i need to just double click the certificate.

Thanks in advance for any help.