Why does my code in my if statement not execute?

I have some code that first in the IBAction:

- (IBAction)LGrabCont:(id)sender {
    if ([self.LGrab isSelectedForSegment:1]) {
        if (LGrabState == FALSE) {
            LGrabState = TRUE;
            [self.output setString:[self.output.string stringByAppendingString:@"The left grabber is now open\n"]];
            [self.output scrollToEndOfDocument:self];
        }
    } else if ([self.LGrab isSelectedForSegment:0]) {
        if (LGrabState == TRUE) {
            if (itemXPos == RealLArmX && itemYPos == RealLArmY && itemZPos == RealLArmZ && pickedUp == FALSE) {
                [self.output setString:[self.output.string stringByAppendingString:@"You picked up an item!"]];
                pickedUp = TRUE;
            }
            [self.output setString:[self.output.string stringByAppendingString:@"The left grabber is now closed\n"]];
            [self.output scrollToEndOfDocument:self];
            LGrabState = FALSE;

        }
    }
}

The variables with the prefix 'Real' are just variables that hold co-ord positions. RArm = Right arm LArm = Left arm. The problem is that when my 'Real' variables are correct and the GrabStates are set to true, the code in the

if ([self.LGrab isSelectedForSegment:0]) {
            if (LGrabState == TRUE) {
                if (itemXPos == RealLArmX && itemYPos == RealLArmY && itemZPos == RealLArmZ && pickedUp == FALSE) {
                    [self.output setString:[self.output.string stringByAppendingString:@"You picked up an item!"]];
                    pickedUp = TRUE;
                }

Doesn't execute. Am I doing something wrong with my segmented view IBActions?