Code signing issue: Developer Certificate expired, help?

The last time I deployed on a device was last week. Since that time, I've been tweaking on the simulator. My developer certificate expired on Oct 11th. I tried to deploy on my iPhone toda开发者_C百科y and got some code sign errors. I checked it out and discovered my developer certificate expired, so I went ahead and renewed it on the Provisioning Portal. Well, that didn't fix my problem, because now I see an error I've never had. In the Organizer window, in the Provisioning Profiles pane, under the provisioning profile for my App bundle, I have a Yellow exclamation point:

"A valid signing identity matching this profile could not be found in your keychain."

I don't understand. I have a renewed certificate and my private key is still here. I feel like I'm going to go crazy. Please help! I can take screenshots but I don't know how to post them here.

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I think I had something similar after installing a new hard drive and rebuilding the machine. I'd suggest blowing away all the certs and stuff and start again with requesting a cert and installing into the keychain. The get a new provision profile etc. I.e. Pretend this is the first time.

It's easy through the portal and only takes a few minutes. That worked for me.