Title: Problems with installation
Last modified: August 19, 2016

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# Problems with installation

 *  [nataliya77](https://wordpress.org/support/users/nataliya77/)
 * (@nataliya77)
 * [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/)
 * Hi!
    I’d like to install WordPress MU on my site in subdirectory. I read instruction
   and did all. But computer shows me this page: Warning: call_user_func_array()[
   function.call-user-func-array]: First argumented is expected to be a valid callback,‘
   _show_post_preview’ was given in /home/tuoamore/public_html/network/wp-includes/
   plugin.php on line 339
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/tuoamore/public_html/network/wp-includes/plugin.php:339) in /home/tuoamore/
   public_html/network/wp-admin/install.php on line 36
 * Fatal error: Call to undefined function: wp_admin_css() in /home/tuoamore/public_html/
   network/wp-admin/install.php on line 43
    What is my mistake? Help me, please.
   P.S. It’s my first site. I never installed sites on hosting.

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [ccrest](https://wordpress.org/support/users/ccrest/)
 * (@ccrest)
 * [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/#post-1159428)
 * Which host are you using? 🙂
 *  Thread Starter [nataliya77](https://wordpress.org/support/users/nataliya77/)
 * (@nataliya77)
 * [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/#post-1159500)
 * I use hosting hussai.com.
    There are MySQL 4.1.22-standart, Perl 5.8.8, PHP from
   4.4.7 to 5.2.2, SSI, phpMyAdmin, Zend Optimizer v3.2.6, SMPT, POP3, IMAP. I’d
   like to create a social network. And I will install WordPress MU, Buddypress 
   and a plugin WordPress with chat (I didn’t decide which one) I downloaded zip
   WordPress MU and Buddypress and started to install WordPress MU. And I got this
   problem with installation. Help me, please.
 *  [ccrest](https://wordpress.org/support/users/ccrest/)
 * (@ccrest)
 * [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/#post-1159554)
 * Look very carefully over your config.php file and make sure you set all the settings
   correctly before running the install script. Your database name and database 
   user names need to be exactly as you see them in MYSQL.
 *  [Samuel B](https://wordpress.org/support/users/samboll/)
 * (@samboll)
 * [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/#post-1159557)
 * wrong forums
    [http://mu.wordpress.org/forums/](http://mu.wordpress.org/forums/)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Problems with installation’ is closed to new replies.

## Tags

 * [installation](https://wordpress.org/support/topic-tag/installation/)
 * [problem](https://wordpress.org/support/topic-tag/problem/)
 * [wordpress-mu](https://wordpress.org/support/topic-tag/wordpress-mu/)

 * In: [Installing WordPress](https://wordpress.org/support/forum/installation/)
 * 4 replies
 * 3 participants
 * Last reply from: [Samuel B](https://wordpress.org/support/users/samboll/)
 * Last activity: [16 years, 8 months ago](https://wordpress.org/support/topic/problems-with-installation-2-2/#post-1159557)
 * Status: not resolved

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