incompatible video codec found in the preset

Hello, First post so apologies if I am in the wrong section.

I am trying to export a sequence from premier pro through the media encoder.

for my project I am required to produce a 720p, 25fps h.264 .mov  however when selecting the format "Quicktime"  there is no drop down in the codec options to allow for H.264 compression.

Under format I have attempted selecting a preset that matches the above settings but I receive the error message

"incompatible video codec found in the preset"

I am using a new laptop (around 2 weeks old) on the windows 7 os

Thanks for your help!