C123 can't send DOWNLOAD ACK

Hi, my problem is, that I can download the firmware on the motorola c123, but I can't send a DOWNLOAD ACK. The Firmware is on the Phone, because I see the "HELLO WORLD" example on the phone screen. I build my own "RS232-to-2.5mm"-Cable and I think it works.... Another thing is, at the end of the download I become permanently the INFO " got 1 bytes ...". Can anybody help me? (Sorry my english is very sad :( ) Here is the output: root@debian:./osmocon -p /dev/ttyS0 -d t -m c123xor ../../target/firmware/board/compal_e88/hello_world.compalram.bin got 2 bytes from modem, data looks like: 06 c1 .. got 5 bytes from modem, data looks like: 1b f6 02 00 41 ....A got 1 bytes from modem, data looks like: 01 . got 1 bytes from modem, data looks like: 40 @ Received PROMPT1 from phone, responding with CMD read_file(../../target/firmware/board/compal_e88/hello_world.compalram.bin): file_size=25108, hdr_len=4, dnload_len=25115 got 1 bytes from modem, data looks like: 1b . got 1 bytes from modem, data looks like: f6 . got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 41 A got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 43 C Received PROMPT2 from phone, starting download handle_write(): 4095 bytes (4095/25115) handle_write(): 3840 bytes (7935/25115) handle_write(): 3840 bytes (11775/25115) handle_write(): 3840 bytes (15615/25115) handle_write(): 3840 bytes (19455/25115) handle_write(): 3840 bytes (23295/25115) handle_write(): 1820 bytes (25115/25115) handle_write(): finished got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: bf . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: dc . got 1 bytes from modem, data looks like: 98 . got 1 bytes from modem, data looks like: 9f . got 1 bytes from modem, data looks like: ff . got 1 bytes from modem, data looks like: 9f . ..... -- View this message in context: http://baseband-devel.722152.n3.nabble.com/C123-can-t-send-DOWNLOAD-ACK-tp4… Sent from the baseband-devel mailing list archive at Nabble.com.