I can do all the notes except once I hit the mute notes I have trouble playing them. The notes are played at a fairly fast speed. But it doesn't matter since i can't even play the mutes at low speed.

Am I supposed to down strum those and play only those two notes or should I full strum all 6 strings and try to mute the two notes.

Tips guys?
you only play those two notes, may b try an up then down stroke? wat song is it suppose to b?
mute the whole fretboard just hold your hand over it and pick those two strings. and there you have 2 muted notes.