Samuel,
I realize I am a Day Late and a Dollar short. But if you are still having this problem I can tell you how to solve it.
You will need to reimage the device. You can go to
Symbol Technologies: Support- Support
Click the Software Downloads on the left side
Scroll down and click Mobile Computers
Scroll down again and choose your Device model and OS
You said you have an MC9000 so you have two to choose from.
MC9000/9060 CE
MC9000/9060 WM
And fine the correct image for your device. It should look something like this:Microsoft Windows CE 4.2 Application and Platform Images for RFID based MC9060-G-RFID
I didn't give you the direct link just in case you have other Symbol/Motorola devices. You will want to know how to search for those packages as well.
Feel free to contact me if you have any questions.
Carl