Maybe i've solved updating openocd from 0.9 version to 0.10 last release and reducing the speed of the adapter from 400Khz to 40Khz.
There is still something strange because when I load a blink test everything works correctly but if I put custom binaries the application seems to go but the connection with opencod is lost so every binaries flash i have to do i have to disconnect and reconnect the olimex adapter.
I have to do other tests