ACR122 emulate MIFARE 1K for 6131 access

[jo.le.ouf]

Hello,

I have an application which use NFCIP P2P between my nokia 6131 and an ACR122 reader with the libnfc librairy. It works fine.
But now, i want to start my application automaticaly with pushregistry. So I want to set my ACR122 in mode emulator MIFARE 1K, in which I save Pushregistry information.
But the problem is : I don't manage to set the ACR122 in mode MIFARE emulator. I have test with the libnfc librairy and with this example :
http://www.libnfc.org/documentation/examples/emulate
code :
http://code.google.com/p/libnfc/sour.../nfc-emulate.c

I want to know if anybody have information about this method ?

Thanks in advance,

Joris