Problem with Xadow NFC v1.0

I´m having problems with the NFC shield (im using NFC shield v1.0).

I can make the NFC shield read tags, write tags, detect NFC mobile.
But i cant read from mobile any kind of info from the NFC shield.

I can´t stablish any kind of connection between the NFC shield and my NFC mobile.
The sketch i tried compiled fine, but my NFC devices doesn´t detect the NFC shield.

I´ve read the wiki lot of times, but didnt found any ussefull info for my problem,
please give me some advice. any help would be apreciated

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