I have Cisco Wireless Controller: 4402. Current Software Version: 5.0.148.2. I want to update current software version to AIR-WLC4400-K9-7-0-230-0I download two files from Cisco website: AIR-WLC4400-K9-7-0-230-0.aes and AIR-WLC4400-K9-7-0-230-0-ER.ae...