I have some trouble in running saga and grass algorithms in sextante. When I double click it appears a pop-up saying:
Missing dependency.This algorithm cannot be run :-( This algorithm requires SAGA to be run.Unfortunately, it seems that SAGA is not installed in your system, or it is not correctly configured to be used from QGIS Click here to know more about how to install and configure SAGA to be used with SEXTANTE
I read the documentation, but i didn't understand what I have to do.