when i install this menu manager
http://mods.mybb.com/view/menu-manager
it does not work do not know why, I'm using MyBB 1.6.8 and the menu manager 1.6.0 I think, is there a solution that will work? please help me
Make sure that the following variable is present in your theme's header template;
{$pluginmenumanager}
I get
The following errors were encountered:
•MyBB could not find the theme with the file you uploaded. Please check the file is the correct and is not corrupt.
What ? This error comes on while "Importing" the theme. The question in first post differs from what you're now asking.
As far as this issue is concerned, make sure you're uploading .xml file and NOT .zip or any other file extension.
okey can you you help me for the first cuestion?
First question ? Which one??
You can even add menu without that plugin, just a small edit is enough
Just use the simple way
Go to:
ACP > Templates and Styles > Templates > YourTemplate > Header Templates > "Header, or Header_welcomblock_member"
Now you will see:
<li><a href="{$mybb->settings['bburl']}">Home</a></li>
<li><a href="{$mybb->settings['bburl']}/memberlist.php">{$lang->toplinks_memberlist}</a></li>
<li><a href="{$mybb->settings['bburl']}/calendar.php">{$lang->toplinks_calendar}</a></li>
If you wanna add a link, Add it here its pretty simple.
<li><a href="http://community.mybb.com/newreply.php?tid=114901&pid=833162">Bring it Back</a></li> <- The following would make a link back to this thread.
Source:
http://community.mybb.com/thread-114901.html
PLEASE USE GOOGLE SEARCH 
in search bar:
site:mybb.com menumanager error