What files do you have in your flash memory? Can you list them on here.
Is the AP still accessible over the network?
Did you load the .tar file directly onto the AP?
If so then it will not boot with this file. a .tar file is the Cisco equivalent of a ZIP file. Before you can use it you need to "unzip" it. The problem is that the AP doesn't have enough memory to hold the .tar file and the unzipped files. Your best bet may be to copy the .bin file from one of your other access points onto this AP to get it to boot, then use the command in my original post. I've used this command on 130 AP1200s without a single problem.
It's done. Everything is working. It was the manual reboot variable that was stated to yes instead of no. The AP wasn't able to reboot automaticlly so i had to change taht variable. I don't know how this was configured by default.