Motorola C139 V1.9.24 Won't Load from osmocom-bb

Greetings, I have a Motorola C139 handset with SW Ver 1.9.24 and a CP2102 USB/UART adapter, which I hope(d) to use with osmocom-bb. In Ubuntu 13.10 (running on [non-virtualized] hardware with an Intel i5-750 CPU), I compiled the toolchain, prerequisites, and osmocom-bb, but when I run the following command (and then briefly press the phone's power button) : ./osmocon -p /dev/ttyUSB0 -m c140 ../../target/firmware/board/compal_e86/loader.compalram.bin I get the following output: got 7 bytes from modem, data looks like: 66 74 6d 74 6f 6f 6c ftmtool Received FTMTOOL from phone, ramloader has aborted got 1 bytes from modem, data looks like: 65 e got 1 bytes from modem, data looks like: 72 r got 1 bytes from modem, data looks like: 72 r got 1 bytes from modem, data looks like: 6f o got 1 bytes from modem, data looks like: 72 r If I briefly press the power button repeatedly, I receive similar output. I would greatly appreciate any suggestions as to how I might be able to coax this into working. Thanks, Rusty D