Stop printing in second order

hi im using sambapos V2 . when i start the system its printing first ticket then stop printing till i restart the system . i change the printer also i change the connection from usb to lan but all give same problem .

Thanks

Did the problem start after something was changed?

When it stops printing are there documents in the printer queue? If yes, if you clear the queue and reset the printer does it print again?

Have you reloaded the printer drivers?

Can you print multiple windows test pages ok?