scanning with psc1210

> I installed hplip0.8.8 which work very good for printing on my psc1210 
> and photosmart 7350.
> But when i try to scan i have the following error:
> "Failed to open drive 'hpaio:/usb/psc_1200_series?serial=MY399F63M75H' 
> Error during device I/O".

My Photosmart becomes unavailable(unplugged) ?????
Scanning on Windows XP works good.




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