simple scan crash. after starting without problems and working properly for some minutes, simple scan (version 3.4.1) crash.
any suggestion is welcomed
thanks in advance

simple scan 3.4.1

3.2.0-38-generic-pae #61-Ubuntu SMP Tue Feb 19 12:39:51 UTC 2013 i686 i686 i386 GNU/Linux

acer aspire 5720
hp photosmart 331o all-in-one