I tried to activate marketpress again.
This time, after a little bit of cleaning up of my code I see that marketpress cohesist in my environment.
However the sidebar doesn't work even if I change the theme with twentyeleven.
In addition when someone buy something digital (I have only a products) she doesn't receive the link to download.
Finally I would like to know where to display the chart widget. Is it possible?
Thanks a mil for the time you would spent on this topic.