I just bought a Jetpack 4620 this weekend and have connected laptops, BB phone, and Kindle to the MiFi device but cannot connect the Playbook. I have tried every wireless key type without success. I can see the increased activity on the Jetpack as it tries to connect but either times out, returns to the device listing page, or asks to reenter the password. I have tried saving the connection and deleting the saved connection. No dice. Any ideas?