Project my screen not working after denim why?

[akifreestyle7]

i updated my lumia 720 to denim but after updating the project my screen feature doesn't work I tried everything said on the microsoft page but no results and am sure its cause of the denim cause my moms 530 works fine without the denim update.. can anyone help me out ?

 

[kibria4muk]

same problem :-( plz solve anyone