I have Ubuntu 11.04
I am trying to install Xvfb and CutyCapt in order to take a snapshot of webpage
I followed a instruction <https://github.com/jaequery/cutycapt-installer-script-on-ubuntu/blob/master/install>
and I executed last line and it gives me an error

xvfb-run: error:Xvfb failed to start

Any solution for that?
Thank you in advance