radius timeout

[Callis]

Hi all
   I have freeradius-1.0.1-1 (with Petr Nixon's patch) 
running on FC-3 and using a postgresql backend to collect 
cisco AAA (stop only) records. My cisco IOS is 12.3(2)T2.

I see a lot of radius timeout on my cisco router while the 
ping times is < 10ms and my radius timeout is set to 50.
   I even went further to connect the radius server and 
the router back to back with a cross cable and still have 
some timeouts.
   What could be wrong with my configs?

Any help will be appreciated. Thank you.