first of all don't let your forum url you will get reported because i'm sure you use null scripts, the only thing i can think of is make a new account and make some other admin give you admin access, also uninstall vbplaza
Edit: wait a min look to your forum url and the vbplaza that you gave, in the first one it says forums/index.php in the second url it say forum/vbplaza.php so try forums/vbplaza.php is a misconfiguration