I have a matrix rs3.5 and remote is a 479x. This was previously installed prier to purchace so I have no user manual. Everything worked great until i had to replace the fob because my original was just wore out and quit working. The screen went out etc. So i bought a new fob and try to follow the instructions I find online to no avail. I cant get the "brain" to enter a "search" mode to pair up the 479x. Im not getting any chirp or flashing of the LED no matter what i do to the ignition or valet/program button. Please help. Thanks in advance