Failed to parse authenticate section

I am a freeradius newbie. I have configured Freeradius 1.1.7 on a Debian/Linux system. When I give the command radisud -X i get the following errors: radiusd.conf[636] Failed to link to module 'rlm_unix': rlm_unix.a: cannot open shared object file: No such file or directory radiusd.conf[1971]

Failed to link to module 'rlm_exec': /usr/local/lib/rlm_exec.a: invalid ELF header

Hi, When I give the command radiusd –X start, i get the the message: radiusd.conf[1600] Failed to link to module 'rlm_exec': /usr/local/lib/rlm_exec.a: invalid ELF header I have read the previous posts and tried to install different packages. I know that this is a issue with Linux/Debian and