Apparently GLIBC_2.7 not found but it exists

[RichyCapy]

Greetings

I have Centos 5.11 (x64)

And Im trying tu run shoutcast but get this error:

./sc_serv: /lib64/libc.so.6: version `GLIBC_2.7' not found (required by ./sc_serv)

So I looked in the /lib64/ folder and found this:
4 lrwxrwxrwx 1 root root 11 Jun 29 17:05 libc.so.6 -> libc-2.5.so

I dont know whats wrong and how to fix it