tk311c tracker only updates the position when the vehicle ignition is turned off

tk311c tracker only updates the position when the vehicle ignition is turned off

commands used

begin123456 (confirm you received begin ok!)
dns123456 link do servidor 5001 (not confirm you received)
apn123456 allcom.vivo.com.br (confirm you received APN ok)
up123456 allcom allcom (not confirm you received)
gprs123456 0,0 (confirm you received GPRS OK!)
tracker123456 (confirm you received tracker ok!)
time zone123456 -3 (not confirm you received)
fix030s***n123456 (not confirm you received)