Mstimer and analogOutput

Why when i use Mstimer2 and i want to have analogOutput at pin 9. But it have output 0v when i give value 255?

whwn i comment Mstimer2, it have output 4.7V.

is it Ms timer2 make effect with that pin?

What the heck is Mstimer2? Post the code.

What board is this?