Having trouble compiling freeradius 2.1.9 on ubuntu 10.04

Hi, Iam having trouble compiling freeradius version 2.1.9 on ubuntu 10.04 when i try to start the server i get an error stating radiusd: error while loading shared libraries: libfreeradius-radius-2.1.9.so: cannot open shared object file: No such file or directory Any help would be appreciated. Thanx