No suitable sender agreement found - File / Adapter, Sender FTP

Hi SDN Friends,

Is my first time in PI with FTP / FILE ( really I'm newbie in PI - but 2 years in ABAP ).

I have configurated my communication channel with and FILE/ADAPTER on a Sender FTP...

I have Tried with 2 FTP, one in my PC, and one Public... but in both cases, it's doesn't works... monitoring my communication channel, I get the No suitable sender agreement found ERROR....

I thought... may be PI has not access to the FTP's servers, so run in SAP PI server, an ABAP program trx se38, program: RSFTP002 and with this, I could connect to the FTP... it works perfectly.

so I don't understand... what I'm doing bad?

Any Help?

regards every body!