Problems to acess my cellphone

Hello guys,
I cannot open my cellphone data. When I put the USB the system shows a message: "Unable to mount Nokia 305: error with cam initialization: -60"
"Unable to mount Nokia 305: error with cam initialization: -1"

But typing "lsusb" on the terminal, the system shows my cellphone:

"Bus 003 Device 004: ID 0421:05b1 Nokia Mobile Phones"

Where can I see more informations about the media on USB ports ?
I'm asking for some way to study how to fix it.

Thanks

(I dont know if it will make some difference but...I'm using a Dell Inspiron 14R with Trisquel 6.0 LTS and my cellphone is a Nokia Asha 305 )