your version is different.. i started my own sheet on solidworks 2012
and how its done
1st made sheet metal
sketch the line on edge which you want to bend
select command "sketch bend"
their are four bend position... check which you want...
for next bend... sketch on again face1 (used in 1st bend)
and draw a line on edge which you want to bend.
here is the setting for 2nd bend
final result... i hope it is required result... if not explain your question more please :)