Problem in testing Radius server

Hi all sorry for my english. i'm running a freeradius server.and i wanted to test it but it doesn't work and i don't know why. i have tried this command : *radtest yhsina yhsina @IPserver 1 testing123.* ** *yhsina *is a user who is located in a LDAP server. it give me this thing : *radclient: no reponse from server for ID 107* thank for your help in advance. Uness -- HSINA Youness Etudiant R&T - IUT--Velizy 78140 Tél : 06.28.73.76.75 -- HSINA Youness Etudiant R&T - IUT--Velizy 78140 Tél : 06.28.73.76.75