Congrats on joining, I spent 23 of my best years serving. If I understand you, your not able to lock the doors with the FOB lock button? Will the FOB UNLOCK the doors? If not, I would suggest the FOB batteries need replacing. If the FOB unlocks the doors but doesn't lock them, I would suspect the contact under the FOB button. Right now I can confirm from your post you can use the key to lock/unlock the drivers door with the key in the FOB. We also know the interior lock/unlock button works as well? We (I) need just a little more clarification. Does the actual FOB buttons do anything (lock or unlock). Finally, does the panic button on the FOB work? It would be an additional clue to narrowing down your problem. I also suggest you download your owners manual .pdf, and if your handy with some tools and like to do your own work, download the service manuals. These two things will answer quite a lot of questions about the systems and components in your new crossfire! Oh, welcome to the forum!