Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Eleven theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
Thread Starter
WOPA
(@wopa)
thanks you a lot – changing the theme really helps but when I turning back previous one (Big City) – the same problem
can you help me to deal with it because I liked that theme and want to leave it
thanks again
Make sure there is no built-in menu option in this theme, which is might over riding the default wordpress menu
Thread Starter
WOPA
(@wopa)
Yeah!
You right
Problem solved by editing functions.php and header.php files
Thank you all very much for your time!!!