[Typo3] error message after installation of taskcenter

[toni]

Hi,
I tried to install the extension sys_messages thereupon I got the 
following error message by clicking the taskcenter menu-button

--------------------------------------------------------------------
    1.
       Warning: Missing argument 1 for overview_main() in 
/www/htdocs/v164369/typo3/typo3conf/ext/sys_messages/class.tx_sysmessages.php 
on line 45
    2.

    3.
       Fatal error: Call to a member function on a non-object in 
/www/htdocs/v164369/typo3/typo3conf/ext/sys_messages/class.tx_sysmessages.php 
on line 47
--------------------------------------------------------------------



My guess was this error is caused by the taskcenter module - thus
I downloaded Kaspers t3X file of the taskcenter from:

http://typo3.org/extensions/repository/search/taskcenter/details/

Since then I get following error message by clicking the taskcenter menu 
button



-------------------------------------------------------------------------
Fatal error: Call to undefined function: mkmenuconfig() in 
/www/htdocs/v164369/typo3/typo3/sysext/impexp/modfunc1/class.tx_impexp_modfunc1.php 
on line 96
-------------------------------------------------------------------------

I despair - maybe someone knows how to fix this problem???

I´m using Typo3 version 3.8.0
Loaded extensions:  rte - csh_de - tt_products - w4x_backup - skin1 
tt_news - dh_popupimg_caption - plugin_mgm - taskcenter_modules - sys 
action - sys_todos - sys_workflows - ts_language_fr

cheers,
toni