Pretty normal for a BP to do that. My BP has been on a feeding strike for a long time now. She has finally come out and started to appear hungry so Im hoping this is the week she starts putting them away again.

But,

Make sure the prey is warm enough. Also a live prey item can sometimes help encourage them to come out of a hunger strike. If you have another snake or something to do with a live item in case it is still refused helps. If you don't you will have to do something with it like dispatch it and freeze it for later which is not always a great idea for everybody.

That said five weeks is not really a long time when dealing with a snake not eating.