Error on radius

[Ackbar Joolia]

Hi,
I am getting this error in my radius log, do you know why this is so and how to get this resolved?

'The maximum number of threads (32) are active, cannot spawn new thread to handle request'

Also, do people know what is the maximum simultaneous incoming authentication calls that the radius process can handle? Or what ways can be adopted to deal with this?

Thanks
Ackbar

No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.516 / Virus Database: 269.17.13/1212 - Release Date: 06/01/2008 22:55