MyBB Community Forums

I have problem with installation, I uploaded all files to my server and when I go to my site it says:
MyBB Error
MyBB has generated a critical error and as a result cannot function correctly.
MyBB Said:
Error Code: install_directory
The install directory (install/) still exists on your server and is not locked. To access MyBB please either remove this directory or create an empty file in it called 'lock'.
Please try clicking the Refresh button in your web browser to see if this corrects this problem.
We apologise for any inconvenience.
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MyBB 1.2.7

And when I add file 'lock' to install directory then it says:

MyBB Error
MyBB has generated a critical error and as a result cannot function correctly.
MyBB Said:
Error Code: board_not_installed
Your board has not yet been installed and configured. Please do so before attempting to browse it.
Please try clicking the Refresh button in your web browser to see if this corrects this problem.
We apologise for any inconvenience.
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MyBB 1.2.7

What do I have to do to install my forum?

Thank you,
Virko

Run the install. [Wiki: Installing] (Broken link, head over to docs.mybb.com instead)

Sorry, I missed that,
Thank you