plugin generic doesn't support my huawei180

[Maxime Boure <mboure ubiquiet com>]

Hello,
Sorry to bother you again, I have a new problem. I have USB 3G dongle Huawei180 (recognized as a huawei220) and the plugin used by the modem-manager is the generic one. Is that ok ?

Now I don't really care of witch plugin is used but it displays me this error.

** Message: (ttyUSB0) opening serial device...
** (modem-manager:971): DEBUG: (ttyUSB0): probe requested by plugin 'Generic'
** Message: (ttyUSB1) opening serial device...
** (modem-manager:971): DEBUG: (ttyUSB1): probe requested by plugin 'Generic'
** (modem-manager:971): DEBUG: (ttyUSB1): <-- '<CR><LF>^BOOT:35596450,0,0,0,31<CR><LF>'
** (modem-manager:971): DEBUG: (ttyUSB0): --> 'AT+GCAP<CR>'
** (modem-manager:971): DEBUG: (ttyUSB0): <-- 'AT+GCAP<CR><CR><LF>+GCAP: +CGSM,+DS,+ES<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:971): DEBUG: (ttyUSB1): --> 'AT+GCAP<CR>'
** (modem-manager:971): DEBUG: (ttyUSB1): <-- 'T+GCAP<CR><CR><LF>+GCAP: +CGSM,+DS,+ES<CR><LF><CR><LF>OK<CR><LF>'
** Message: (ttyUSB0) closing serial device...

** (modem-manager:971): WARNING **: do_grab_port: plugin 'Generic' claimed to support tty/ttyUSB0 but couldn't: (0) Could not get port's sysfs file.
** Message: (ttyUSB1) closing serial device...

Does anyone have an idea ?

Thanks a lot 
Regards
M.B.