404 Error with Login / User menu - Joomla! Forum - community, help and support

hey
i've created site joomla , have couple of menus, articles, extensions etc.

everything works fine, accidently remove module called 'user-menu' , everytime press login or log out 404 - error.

code: select all

404 - component not found

you may not able visit page because of:

   1. out-of-date bookmark/favourite
   2. search engine has out-of-date listing site
   3. mistyped address
   4. have no access page
   5. requested resource not found.
   6. error has occurred while processing request.

please try 1 of following pages:

    * home page

if difficulties persist, please contact system administrator of site.

component not found

the browser adress says 'index.php?itemid=6&option=' in end. have tried turning seo on , off , doesn't work.

this annoying :s when press login log in don't redirected come error page , same logout. hope understand.

thanks in advance.

fixed somehow......

i have nooooo idea how ._.


is possible there kind of latency when modules in works? since did nothing 15~ minutes , started working again