1) If you can't login to your Joomla!/Mambo backend after the installation or uninstallation or got error display on your web site after the uninstallation, please skip to the step 6. Or else please login to your Joomla!/Mambo backend as an Super Administrator.

Okay, you have problem with your installation or uninstallation, let's manually restore some of your Joomla!/Mambo files. Please manually replace the following files with your backup files or original files from Joomla!/Mambo installation package. IMPORTANT: Please make sure the files have been replaced successfully.
Files to be manually replaced back:
includes/authenticator.php (Mambo 4.6.x only)
includes/cmtclasses.php (Mambo 4.6.x only)
includes/core.classes.php (Mambo 4.6.x only)
includes/gacl.class.php
includes/gacl_api.class.php
includes/joomla.php (Joomla! only)
includes/mambo.php (Mambo 4.5.x only)
components/com_content/content.class.php (Mambo 4.6.x only)
components/com_content/content.html.php
components/com_content/content.php

7) Play around with your Joomla!/Mambo frontend and backend pages to see any error occur. If you still found error, please continue to the next step or else please go to backend to uninstall the component if you haven't done it and you are DONE .

8) Okay, you still have problem after the file replacement. Now mostly the error is related to your data_base_. Let's manually fix your data_base_ error. Please execute the following SQL queries through your phpMyAdmin and remember to replace 'jos' or 'mos' to your data_base_ table prefix value:

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i make this, now i can acces in the front, but in the backed noo!!

please i need helo