MyBB need help about making threads

[hydrothunder]

hi friends i have made a new forum .............
wen i try to create a thread i shows.............

Authorization code mismatch. Are you accessing this function correctly? Please go back and try again.

help me

 

[Virtual]

mostly it due chown error
are you in shared hosting or vps ?

 

[hydrothunder]

yep...... i fixed the problem........ but i have a nother problem....... i m unable to change the theme.........it shows ur folder contains files that is not related to themes