Unhappy [Q] Cant flash Lastest cyogenmod nightly

Hello

I have a ATT s3 i747 running cm 11 4.4

I can seem to flash to the latest nightly
I download the 07292014-nightly-d2lte

I am running 07112014-nighly-d2lte

When I reboot in to recovery
i select my zip file and proceed to install

comes up with error

INCOMPATIBLE file
installation aborted
status 7

Thats not the correct message but it does say incompatible.

Can you guys pls help me

Thank you