TMS320F28069: Erase Flash through USB

Hello,

I want to erase some sector Piccolo's FLASH with a command transmitted through USB serial CDC.

I manage to erase the sectors though UART, but with USB I suspect that the library get lost because it resides in FLASH.

So, I tried to place usblib in ram with this code:

usblib              : LOAD = FLASHF,
                            RUN = RAML7_L8,
                            LOAD_START(_RamUSBLoadStart),
                            LOAD_END(_RamUSBLoadEnd),
                            RUN_START(_RamUSBRunStart),
                            LOAD_SIZE(_RamUSBLoadSize),
                            PAGE = 0
    {
      "usblib.lib"(.text)
    }

and memcopy it in ram.
But it doesn't seem to work. It's not a compilation error, but i can't communicate after the erase command, and the erase time seems to be "fast".

Do I miss something ?
Anybody tried to do this ?

Best regards,
Marc