[rbak-nsp] Can anyone help me to relate this error?

[Navin Nepali]

Hi!
In my SE800 box, I am getting lot's of "%AAA-7-EXCEPT: aaa_idx 195fe837: rad_create_auth_db_reply: Radius authentication fail, rejected by radius server." 
 
Because of these auth. rejection, the cpu load is very. Can anyone relate me why this rejection is generated?
 
Radius server we are using is Aradial's.
 
Thanks



      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/redback-nsp/attachments/20100727/f11a88b8/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: AAA Log.rar
Type: application/octet-stream
Size: 11246 bytes
Desc: not available
URL: <https://puck.nether.net/pipermail/redback-nsp/attachments/20100727/f11a88b8/attachment.obj>