upgrading freeradius .1.1.6 on ubuntu 7.10

i've read the previous tread on this mailing list about upgrading freeradius. in that tread i got this :this command to upgrade freeradius./configuremakemake install i did run those command and everything in my freeradiu going mess, like when i try to restart my freeradius it return like cannot found library freeradius-library.2.5.1.so what happen,,??