Bias FX no longer making any sound

[Sam Plautz 0]

I have had bias fx on my I pad for six months now. For 5 months no sound would ever come out of it. I plug it into the input on my amp using irig 2. Recently I plugged it in and it just started working and did so for about a week. Then I plugged it in one day and it doesn't work anymore. No sound will come out of it. I'm amp still works and sound comes out of it when not using bias fx. I have a peavy rage 258. Seriously why does it not work!?!?!