Calling on Functions

[JavaNoNothing14]

My program is set so that i have my shoot, grab, compressor all as different global signatures and calling it from within the teleop. Each function seems to be working fine individually. However when I put them all together No part of my program wants to work

public void teleopPeriodic(){
     Shoot();
     Timer.delay(0.1)
}
// the shooter would work fine

public void teleopPeriodic(){
     Shoot();
     Grab();
     Cyl();
     Timer.delay(0.1)
}
//no part of each function has the same properties as the other function. Program won't do anything. Seems like the functions don't want to work.