Can't scan from a networked Canon fb630u scanner

I run a linux server with a shared fully supported canon fb630u scanner through xsane,. Linux server configuration is ok, scanning from windows seven xsane-32 application works.
This is the macbook net.conf
connect_timeout = 15
# localhost
192.168.2.21
Ok, now running the command scanimage -L gives this result:
device `net:192.168.2.21:canon630u:libusb:002:004' is a CANON Canoscan FB630U flatbed scanner
So networked scanner is recognized by macbook...
But if i open Image Capture i can't see any devices neither in DEVICES nor in SHARED...
Moreover If i try to scan with simple command line scanimage all works!
So where am i wrong?

First of all, even though you mention network scanning, I am not sure if you have the printer using the internal wireless support or if you have it connected to the USB port of the Airport Extreme. Some users interpretation of network connections vary. So if you do have it connected to the USB port of the Extreme, then scanning is not supported. This is a limitation of Airport devices.
If however you have configured the MP640 to connect to the Extreme via wireless and you are trying to initiate the scan from the MP640 to the Mac using the Scan button, then you need to have the [Canon IJ Network Tool v2.70|http://support-au.canon.com.au/contents/AU/EN/0200080802.html] installed on the Mac.
Also, if you want MP Navigator to open when you use the MP640 Scan button, you need to install [MP Navigator Opener v3.0|http://support-au.canon.com.au/contents/AU/EN/0200087801.html] on the Mac.
Note that for the network scanner, there should be a separate MP640 entry under the heading of Scanners within the list of devices in Print & Fax. With this MP640 selected, you will have the Open Scanner button visible in the right hand pane. If you click this button, the MP640 scanner window will appear and attempt to connect to the AIO. Does this occur for you?

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First of all, even though you mention network scanning, I am not sure if you have the printer using the internal wireless support or if you have it connected to the USB port of the Airport Extreme. Some users interpretation of network connections vary. So if you do have it connected to the USB port of the Extreme, then scanning is not supported. This is a limitation of Airport devices.
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Can't scan from a networked Canon fb630u scanner

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