Two radius demaons running, problem !!!

[Moktar KONE]

Hi all, I am using freeradius 0.9 and I have two radiusd deamon running : one on port 1645/1646 for Dialup users authentication and the other on port 1812/1813 for ADSL users authentication . I launched the two daemons with success and I can test with success authentication for ADSL and Dialup users  but after some minutes the second deamon (listinning port 1812/1813) dies! It is always the same scenario when I launch it an other time. can someone help to find why this happens and how can I solve it?