SFTP Receiver adapter error Message could not be forwarded to the JCA adapter

Hi Experts,

I'm needing help to solve a problem with an SFTP Receiver interface.

Before I was sending in the adapter configuration as "Direct" in Write Modus (File .txt) and now I changed to "Use temporary file" is occurring this error:

Message
could not be forwarded to the JCA adapter. Reason: 2: Moving
/ABCftp/To_XXX/140187613515701OUT_20140604-100214-622.TXT.tmp to /ABCftp/To_XXX/01OUT_20140604-100214-622.TXT failed.

Files as TXT they are being written to the SFTP however when as TMP returns this error ... would not rule SFTP server to accept different TXT files?

I also changed the namespace to "http://sap.com/xi/XI/System/SFTP" and "http://sap.com/xi/XI/System/File" but is not working.

Any help will be welcome!

tks.