need help with my stupid alarm
 

its a viper 600. i took out the siren a while back and now i tried to put it back, it doesn't work! i hooked black to ground and red to the red wire going to the brain. wtf. the siren works fine hooked to the battery. so do i need to reset something? is my system screwed? also i noticed my backup battery doesnt work like if you arm the system and take out the fuse, it doesn't trigger the alarm anymore. someone help i have everything taken apart...its gonna be like that cause i also noticed a coolant line is cut so bla