My theme doesn't change..

[+ Praah]

Hi all, I don't understand why my theme doesn't change. I tried with several pre-registered theme but I still have the same one so I can't put that of DT..

 

EDIT:

 

Second problem that has just intervened.. I have a message (Sorry, you don't have permission to access this page.) 

 

 

Editado 9 Marzo por Praah
I just had another problem