Upgraded to DSM 4.0 - USB printer stopped working

[lithium]

Hello,

today I've upgraded DSM from 3.2 to 4.0 and my printer Brother DCP 7010L stopped working.
Before upgrade it worked perfectly as a shared network printer.

I can see a printer in 'external USB devices' (sometimes) and the status is ok, but when I try to print, nothing happens.
If I try 'print test page' from DSM, nothing happens.

I've noticed that printer status display briefly shows 'receiving data', but then nothing is printed again

Thanks for the help in advance.

[lithium]

Resolved: reinstalled printer on my pc & connected to front USB on my synology.
Now it works as previously. DS212.

[Derek Leung]

After updated to 4.0 I can't print through my 212 anymore, no matter I plug my Epson printer on Front or Back USB still no luck ! ! ! I think I did everything already including restart everything !

On my Mac it show there was a communication problem! but in my Print Preference the printer was show in idle mode ! ! !
I also try delete it and re-add the printer it can be found but it just nothing happens when print the job!

Help Help Help !

I'm so disapointed to upgrade it ! ! !