I have an HTC desire Z aka the T-mobile G2. On a bone stock rom, the play store works with no issues. After rooting, on stock rom, playstore still works. Now, the minute I flash a custom rom with the correct gapps, the playstore never works. I always get an (RPC S-7 AEC-7) error. I've tried many roms from gingerbread to kitkat and none of them have the playstore functioning properly. I noticed the google play framework and google play services weren't there so I sideloaded the apps, and it still doesn't work. I tried clearing caches, factory resets, removing my google account, wiping playstore, services and framework data, and nothing works. What could this be???