5 weeks is really not that long, considering they sometimes take far longer breaks, even if they haven't been moved and nothing has changed.

For adults, it is much more difficult to get used to a new situation. And going to F/T from live, is difficult with an adult who never ate anything else.

But it can be done. I used to rescue imported adults that were in rough shape. Full of parasites, never having eaten anything, URI, scale rot, etc.. Now they really were a challenge. Time just didn't factor in. It took as long as it did. First of all just getting them healthy took time. Letting the meds work. Getting them housed in a small, private and dark container with the correct heat and humidity.

Once healthy, the battle with feeding began. I didn't even try F/T right of the bat. I wanted them to eat readily once healthy and comfortable in the new setup. For some it even took Gerbils. Live ones But they all switched eventually. They were placed when they ate F/T rats readily.

After a long break (and yours didn't have a long break just yet) it can help to jump start their Metabolism with one live meal. Smaller then what they would usually take. Once they had a meal, it seems their Metabolism really kicks in and they get HUNGRY!!! Most will then take a F/T or at least Pre killed as their next meal, after waiting 5 to 7 days.

Yours may need some more down time, but you could try to feed a small, live meal and see if that will get them going again. I just told a local guy about that trick, and it worked for his BP beautifully

That said, do NOT go to Gerbils or anything like that. I did that because of the snakes having been imports, having never eaten rats, and I needed to try anything to get them started.