Now that you have the Firmware downloaded.

Note: do not type the [ ] brackets in the instructions below, only what is between them and then press [enter].

1. Shell out to a DOS prompt, and change to the same directory where the firmware file is located.

2. Open an ftp session by typing the following,  [ftp    the address of the controller].  

When asked for a user name type [root], when asked for a password type [pass].

3. Type, [binary] to switch into binary mode.

4.  Type, [put  cde43.bin   flash]. 

When the status light on the controller goes blank, you are now back up and running.  

All of the network and security settings will remain intact, only the firmware is updated.