IMPORTANT - if you are upgrading your classification...
I sent in all my paperwork to AMP and never heard back from them to schedule my exam. I just called and they said I was good to go. They said they tried to call and email but had my wrong contact info somehow. I don't know how since the paperwork I sent in had my current information.
Anyway, if you have sent in your documentation and haven't heard from them after a month or so, you might want to call 800-345-6559 and check with them.