calibre was regonizing my device and then it stopped

[Valk]

i changed the cover on some images, and then tried to 'add to device them' (they were already there in my samsung galaxy s # 1) ..... im using Aldiko book reader, what do i have to delete to get the stupid things to start talking to eachother, i went into my files via folder options in my phone and deleted all the books but backed them up on my pc (thank god).

os - windows vista
pc - hp desktop
lastest version of calibre ([link]

and this is the debug error i get (i put it Calibre in debug mode)
calibre Debug log
calibre 0.9.34 isfrozen: True is64bit: False
Windows-Vista-6.0.6002-SP2 Windows ('32bit', 'WindowsPE')
('Windows', 'Vista', '6.0.6002')
Python 2.7.4
Windows: ('Vista', '6.0.6002', 'SP2', 'Multiprocessor Free')
Starting up...
Started up in 10.00 seconds with 18 books
Failed to get device info for device: \\?\wpdbusenumroot#umb#2&37c186b&1&storage#volume# 1&19f7e59c&0&_??_usbstor#disk&ven_samsung&prod_s ph-d700_card&rev_#393516395a2a00ec&0##{6ac27878-a6fa-4155-ba85-f98f491d4f33} Failed to open device: hr=2147942403 facility=7 error_code=3 description: The system cannot find the path specified.

Failed to get device info for device: \\?\wpdbusenumroot#umb#2&37c186b&1&storage#volume# 1&19f7e59c&0&_??_usbstor#disk&ven_samsung&prod_s ph-d700_card&rev_#393516395a2a00ec&0##{6ac27878-a6fa-4155-ba85-f98f491d4f33} Failed to open device: hr=2147942403 facility=7 error_code=3 description: The system cannot find the path specified.

[kovidgoyal]

That's an error communicating with the device. Things I would try:

1) Reboot the device
2) try a different USB cable/USB port