What does it mean when the WPS LED is blinking rapidly on the WRE2206?

A rapidly blinking WPS LED indicates that the WRE2206 has failed to connect to a router or AP using WPS. A slowly blinking WPS LED means the WRE2206 is waiting for another WPS device to connect, or the device is in the process of starting up, rebooting, or resetting. If the WPS LED stays on steadily, a successful WPS connection has been established within the last 5 minutes. (Page 10)