Dont try all the time. Give him a week between tries! Sounds like you gave him 4 days which should be OK in my opinion.
Also don't stress about him not eating! My BP hasn't eaten for over two months! As long as he doesn't lose too much weight he should be fine! They are be very picky and touchy eaters! It can take time and patience!
Make sure all your husbandry stuff is perfect, like "addsdad" said!
Keep your stick on the ice!!!!!