MyBB Community Forums

http://wiki.mybboard.net/index.php/Upgrading
it says
You will see a drop down list asking what version of MyBB you're upgrading from. Be sure you select the correct version you are currently using or else the upgrade will not work correctly or completely!
i have a installed mybb 1.2.13 in my forum when i tried to upgrade it does not show it in the drop down list

MyBB 1.2.13 is the latest version of MyBB. Unless you are having the "Authorisation Code Mismatch" problem, you don't need to upgrade.

Please advise what situation you are in.

im having the Authorisation Code Mismatch problem

Try picking 1.2.10.

arite i will try now

Thanks DennisTT Fixed

Glad it worked for you.