My guy won't eat!!!

We have had a "New" pin-strip since the end of January '13. He has not eaten as yet. We have offered frozen, live all without any success. He has had one shed. He also has had a respirtory infection that has been treated with some success but still some mucus but is better. Should I be worrie or not? The vet suggested bringing him in for an appitite stimulant... I am not sure about this...

Can you go into detail about your setup for him, temps, and how you're measuring temps with (or better yet post a photo)?

How was the RI being treated with "some success"? Is the RI gone or not? I've had three snakes come to me with RIs (one adult, two babies from an expo: I am treating one of the babies now while the other cleared up perfectly already) and all of them when ill showed no interest in food until they got better. This could be the case with your guy.