Batch – Ping IP and execute different commands on return

I'm trying to make (hopefully a simple) script that when run pings my mobile device.
If the mobile is connected to the network it will execute one command and if not it will execute another.

I've tried with the following command:

ping -n 1 (The IP) >nul    
IF ERRORLEVEL 0 GOTO safe    
IF ERRORLEVEL 1 GOTO alarm

:safe    
start home.mp3    
GOTO end

:alarm    
start alarm.mp3    
GOTO end

:end
exit

This actually worked once, but since then it doesn't work after the first ping.
Is it something I'm missing? Perhaps there's an easier way of doing this?