Calibre (E book management) problem on Elementary OS Luna

I have had Calibre installed for some time now and it has always worked fine. Right now I tried to send a book from the Calibre library to my Kindle and I keep getting this message: calibre, version 0.8.38 ERROR: Error: Error communicating with device The reader has no storage card in this slot. Traceback (most recent call last): File "/usr/lib/calibre/calibre/gui2/device.py", line 81, in run self.result = self.func(*self.args, **self.kwargs) File "/usr/lib/calibre/calibre/gui2/device.py", line 411, in _upload_books metadata=metadata, end_session=False) File "/usr/lib/calibre/calibre/devices/usbms/driver.py", line 252, in upload_books path = self._sanity_check(on_card, files) File "/usr/lib/calibre/calibre/devices/usbms/device.py", line 978, in _sanity_check raise ValueError(_('The reader has no storage card in this slot.')) ValueError: The reader has no storage card in this slot. The book can't be sent to the device. I tried to remove Calibre and re-install it but it did not work. **Edit 1)** Immediately after plugging in the kindle and running lsusb i get: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 004: ID 04f2:b307 Chicony Electronics Co., Ltd Bus 001 Device 007: ID 1949:0004 Lab126 Amazon Kindle 3 and after running dmesg | tail i get: [ 7202.714177] usb 1-1.2: new high-speed USB device number 7 using ehci_hcd [ 7202.829763] scsi8 : usb-storage 1-1.2:1.0 [ 7203.831695] scsi 8:0:0:0: Direct-Access Kindle Internal Storage 0100 PQ: 0 ANSI: 2 [ 7203.832255] sd 8:0:0:0: Attached scsi generic sg2 type 0 [ 7203.837580] sd 8:0:0:0: [sdb] 2846720 512-byte logical blocks: (1.45 GB/1.35 GiB) [ 7203.942275] sd 8:0:0:0: [sdb] Write Protect is off [ 7203.942287] sd 8:0:0:0: [sdb] Mode Sense: 0f 00 00 00 [ 7204.052235] sd 8:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 7204.323058] sdb: sdb1 [ 7204.551835] sd 8:0:0:0: [sdb] Attached SCSI removable disk