problem with radrelay

Hi, first of all hello to everybody! I have a problem with my freeradius installation. I'm using it to pass data from a softswitch to another radius server. The radiusd daemon receive data and put it into a file called "details". The radrelay should read from this file and send data away. The problem is that it seems not to read from file ... If i run it with -f -xxx options it read few data from the file and nothing else, while in the detail file there are a lot of data ... Anyone have an idea of which can be the problem?

Thanks,Riccardo