What was the snake eating before you brought it home?
Assuming the snake was eating F/T prey before you shouldn't need to try live yet. There are plenty of other variables that may be at play that we can work on first.
In order to help you we'll need more info. The more you tell us the better we can help you.
- what type/size enclosure is the snake in?
- how are you heating the enclosure?
- ARE YOUR HEAT SOURCES REGULATED BY A THERMOSTAT?
- what are your temps?
- how and where are you measuring temps?
- do you have at least 2 snug fitting hides?
- what size prey are you offering?
Lastly, are you handling the snake at all?