1)Click on setup-->customization-->layouts-->choose potentials from the modules list-->check whether expected revenue and stage/probability is listed under the list of removed fields-->if it so, please drag and drop the same under potential information section-->save.
2) Go to setup-->users & permissions-->fields & links permissions-->choose your profile and module-->enable the check box for visibility for probability and expected revenue and stage-->save.
But it didn't work :(
Anyone experienced this? Does anyone have a solution for this?