ftpget Exiting Singal 15 ?

Does anyone know why this error keeps poping up in my squid log ?

ftpget Exiting Signal 15

As everything this happens . Squid terminates & re-starts.

PS I am using Squid 1.1.11 On RedHat 4.1

Thanks In Advance,
Daryl,

                 | email : dlim@ihug.co.nz (Use This First)
-=>Daryl Lim<=- -| email : daryl@genesis.pakuranga.school.nz
                 | WWW : http://homepages.ihug.co.nz/~dlim/
                                                                              
Received on Wed Jul 09 1997 - 13:45:09 MDT