RSSI firmware

Hello everybody I'm trying to use the RSSI firmware on a c118 and c115. Both of them give me this error host/osmocon/osmocon -p /dev/ttyUSB0 -m c123xor target/firmware/board/compal_e88/rssi.compalram.bin got 1 bytes from modem, data looks like: 04 . got 1 bytes from modem, data looks like: 81 . 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 The maximum file size is 64kBytes (65535 bytes) read_file(target/firmware/board/compal_e88/rssi.compalram.bin) failed with -27 Do I need to do something different to load this FW or simply my phones have no enough room for it? Thanks for your help. Dario.