Stuck sending bootloader

[MalibuKoKo]

wheelie is buggy and blocked in an infinite loop

Example : wheelie --blob blob.bin

Wheelie 0.1 - Preflight for nvflash.
Copyright (c) 2011-2012 androidroot.mobi
========================================

Waiting for device in APX mode...
[=] Chip UID: 0x15c7d7a440ff123
[=] RCM Version: 0x30001

[=] CPU Model: Tegra 3
[+] Sending bootloader...
Sending file: 100 %

Example : wheelie --blob blob.bin -U bricksafe.img

Wheelie 0.1 - Preflight for nvflash.
Copyright (c) 2011-2012 androidroot.mobi
========================================

Waiting for device in APX mode...
[=] Chip UID: 0x15c7d7a440ff123
[=] RCM Version: 0x30001

[=] CPU Model: Tegra 3
[+] Sending BCT

any help will be appreciated.

Thanks