Android Question SOLVED Issue while testing Filetransfer sample APP

Hi everybody,
i'm testing the FileTransfer sample with a HC06 module. The module works with a bluetooth terminal APP. When after choosing the HC06 module I click the connect button after a few seconds I get "java.io.IOException: read failed, socket might closed or timeout, read ret: -1" The source code is unmodified. The Samsung has 4.2.2 OS. The B4A compiler is 6.0.
Thank you
Mauro