Converting AIR-AP1231G-A-K9 to lightweight mode

Hi Everyone,
I have an issue with Cisco AP AIR-AP1231G-A-K9 after converted to Lightweight mode. I am using WLC 2106 with version code of 7.0.98.0 but after successfull conversion from autonomous mode to lightweight mode the, the AP is not getting associated to WLC. It shows up for a one or two seconds under WLC and then again disappers. This AP has raido AIR-MP31G which i think is supported for converting it to lightweight mode.
Please see below the log of the upgrade utility after convertign to lightweight mode.
2013/07/02 18:45:38 DEBUG            34.109.56.4            Validating IP address
2013/07/02 18:45:38 DEBUG            34.109.56.4            Opening a telnet connection to the AP
2013/07/02 18:45:40 INFO            34.109.56.4            User  has  Full privilege
2013/07/02 18:45:40 INFO            34.109.56.4            Getting  AP Name
2013/07/02 18:45:40 DEBUG            34.109.56.4            Verify if APs image is 12.3(07)JA or greater
2013/07/02 18:45:41 INFO            34.109.56.4            AP  has 12.3(7)JA Image or greater
2013/07/02 18:45:41 DEBUG            34.109.56.4            Identifying the AP Type
2013/07/02 18:45:41 INFO            34.109.56.4            Term Length configured.
2013/07/02 18:45:41 INFO            34.109.56.4            Upgrade Tool supported AP
2013/07/02 18:45:41 DEBUG            34.109.56.4            Check whether AP has supported Radio
2013/07/02 18:45:41 INFO            34.109.56.4            AP has Supported Radio
2013/07/02 18:45:41 DEBUG            34.109.56.4            Verifying Station Role
2013/07/02 18:45:42 INFO            34.109.56.4            Station role is  Root AP
2013/07/02 18:45:42 DEBUG            34.109.56.4            Check whether AP has  MIC Certificate
2013/07/02 18:45:42 INFO            34.109.56.4            MIC is already configured in the AP
2013/07/02 18:45:42 DEBUG            34.109.56.4            Getting Ethernet MAC address
2013/07/02 18:45:42 INFO            34.109.56.4     Hardware is PowerPC405GP Ethernet, address is 0007.0e5b.8e9d (bia 0007.0e5b.8e9d) 
2013/07/02 18:45:42 DEBUG            34.109.56.4            Getting the Radio Status
2013/07/02 18:45:42 DEBUG            34.109.56.4            Entering Configuration mode
2013/07/02 18:45:42 INFO            34.109.56.4            Inside Shutdown function
2013/07/02 18:45:45 INFO            34.109.56.4            Shutdown the Dot11Radio0
2013/07/02 18:45:45 DEBUG            34.109.56.4            Getting Current System Time
2013/07/02 18:45:46 INFO            34.109.56.4            Updating the AP with Current System Time
2013/07/02 18:45:46 DEBUG            34.109.56.4            Entering Configuration mode
2013/07/02 18:45:47 DEBUG            34.109.56.4            Executing show run
2013/07/02 18:45:47 INFO            34.109.56.4            Saving the configuration into memory
2013/07/02 18:45:47 INFO            34.109.56.4            Getting  AP Name
2013/07/02 18:45:47 DEBUG            34.109.56.4            Loading the LWAPP Recovery Image on to the AP
2013/07/02 18:48:10 DEBUG            34.109.56.4            Checking the Upload Status
2013/07/02 18:48:12 INFO            34.109.56.4            Successfully Loaded the LWAPP Recovery Image on to the AP
2013/07/02 18:48:12 INFO            34.109.56.4            Executing Write Erase Command 
2013/07/02 18:48:18 INFO            34.109.56.4            Flash contents are logged
2013/07/02 18:48:20 INFO            34.109.56.4            Logged nvram: contents
2013/07/02 18:48:22 INFO            34.109.56.4            Logged crypto trust-points
2013/07/02 18:48:24 INFO            34.109.56.4            Logged crypto certificates
2013/07/02 18:48:26 INFO            34.109.56.4            Terminal length set to Zero
2013/07/02 18:48:32 INFO            34.109.56.4            Loading 34.109.56.4env_2July2013_184830.log from 34.108.7.50 (via BVI1): !
2013/07/02 18:48:32 INFO            34.109.56.4            Reloading the AP 
2013/07/02 18:48:36 INFO            34.109.56.4            Successfully executed the Reload command 
2013/07/02 18:48:36 DEBUG            34.109.56.4            Closing the Telnet Session 
The Command output form WLC please see bellow
(Cisco Controller) >show ap join stats summary 00:07:0e:5b:8e:9d
Is the AP currently connected to controller................ Yes
Time at which the AP joined this controller last time...... Not applicable
Type of error that occurred last........................... Lwapp configuration                                                                                         request rejected
Reason for error that occurred last........................ Ignoring config stat                                                                                        us as mac address is not present in database
Time at which the last join eror occurred.................. Jul 03 02:43:25.677
(Cisco Controller)

This was the command detailed output from WLC
(Cisco Controller) >show ap join stats detailed 00:1d:45:eb:f6:80
Discovery phase statistics
- Discovery requests received.............................. 114
- Successful discovery responses sent...................... 76
- Unsuccessful discovery request processing................ 0
- Reason for last unsuccessful discovery attempt........... Not applicable
- Time at last successful discovery attempt................ Jul 03 04:19:19.791
- Time at last unsuccessful discovery attempt.............. Not applicable
Join phase statistics
- Join requests received................................... 37
- Successful join responses sent........................... 37
- Unsuccessful join request processing..................... 0
- Reason for last unsuccessful join attempt................ Not applicable
- Time at last successful join attempt..................... Jul 03 04:19:18.831
- Time at last unsuccessful join attempt................... Not applicable
Configuration phase statistics
- Configuration requests received.......................... 74
- Successful configuration responses sent.................. 0
- Unsuccessful configuration request processing............ 37
- Reason for last unsuccessful configuration attempt....... Ignoring config status as mac address is not present in database
- Time at last successful configuration attempt............ Not applicable
--More-- or (q)uit
- Time at last unsuccessful configuration attempt.......... Jul 03 04:19:19.638
Last AP message decryption failure details
- Reason for last message decryption failure............... Not applicable
Last AP disconnect details
- Reason for last AP connection failure.................... Not applicable
Last join error summary
- Type of error that occurred last......................... Lwapp configuration request rejected
- Reason for error that occurred last...................... Ignoring config status as mac address is not present in database
- Time at which the last join error occurred............... Jul 03 04:19:19.638
                                                                                Ethernet Mac : 00:07:0e:5b:8e:9d  Ip Address : 34.109.56.10
(Cisco Controller) >

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