I have the AVR-P40-8535. http://www.sparkfun.com/commerce/produc … ucts_id=31
I programmed AtMega32 to set pin B0 to low so the led will light up.
When working with 5V it works.
When adding 3.3V jumper, the led does not light up.
What is missing?
On your board, what do you have in the socket: ATmega32 or ATmega32L?
The ATmega32 requires 4.5 - 5.5V, but the ATmega32L can run from 2.7 - 5.5V…
So basically you need an ATmega32L on your board for it to work at 3.3V. 
And don’t forget, you still need to supply power the board around 1.5 ~ 2V higher than the target…
Thanks so much!