You switched from a 40V, 200mA PNP transistor (which appears to pretty much be a surface mount 2N3906 at first glance) to a 30V, 1.7A N channel MOSFET. May I ask why? The 3906 is still very much available; DigiKey quite literally has millions of them in stock. You didn't just drop the MOSFET into the circuit designed for the 3906... did you?