[cisco-voip] Radius accounting for sip (Cisco 2600)

[yy]

Hi,

I'm trying to do accounting for my sip calls using radius server. 
Currently, my configuration for my router is as follows :

!
aaa authentication login default local line
aaa authentication ppp default group radius
aaa authorization exec default if-authenticated
aaa authorization network default group radius
aaa accounting update newinfo
aaa accounting network default start-stop group radius
aaa accounting network h323 start-stop group radius
aaa accounting connection h323 start-stop group radius
aaa accounting resource h323 start-stop group radius
aaa session-id common

!
radius-server host 192.168.1.2 auth-port 1812 acct-port 1813
radius-server key xxxxxx

! Note : the gw-accounting <voip | h323 | syslog> command is depreciated 
and is not used
gw-accounting aaa
 attribute acct-session-id overloaded
 attribute h323-remote-id resolved

In the radius database in mysql, I am using the radacct to store the 
accounting information. However, i've noticed that the follow fields are 
empty. Why isn't information stored inside the database?

Variables with empty fields in radacct table.

 | H323GWID                | varchar(32)          |      |     
|                     |                |
| H323CallOrigin          | varchar(10)          |      |     
|                     |                |
| H323CallType            | varchar(64)          |      |     
|                     |                |
| H323SetupTime           | timestamp            | YES  |     | 
CURRENT_TIMESTAMP   |                |
| H323ConnectTime         | timestamp            | YES  |     | 
0000-00-00 00:00:00 |                |
| H323DisconnectTime      | timestamp            | YES  |     | 
0000-00-00 00:00:00 |                |
| H323DisconnectCause     | char(2)              |      |     
|                     |                |
| H323RemoteAddress       | varchar(255)         |      |     
|                     |                |
| H323VoiceQuality        | decimal(2,0)         | YES  |     | 
NULL                |                |
| H323ConfID              | varchar(255)         |      |     
|                     |                |


Does anyone has any idea of what's wrong ?

Regards,
YY