Google Wallet not working at registers

Stock, rooted Touchwiz ICS. I follower the directions on XDA regarding changing the build.prop, flashing that lib fix, and flashing the fixed Wallet app, and the app seems to work well on the phone. However, I've been to several Jamba Juices, McDonalds', and 7-11s, and all had the green light at the PayPass terminals.

Can anyone help here? If worst comes to worst, can I just uninstall Wallet and then try to reinstall from scratch?


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