Can't update forum - Deprecated: preg_replace error

[chkenparm]

I get the message Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/brinkofs/public_html/forum/Sources/Load.php(225) : runtime-created function on line 3 whenever I try to edit a post and when I try to update for forum to the newest version.  Does anyone know how to fix this?  I'm a complete noob so please keep it user friendly.

[Sir Osis of Liver]

Which version are you updating to which version?  How are you doing the upgrade?

[chkenparm]

I have 1.1.19 and I'm trying to install 1.1.21.  I'm just trying to click on the update available link in the admin section.

[Sir Osis of Liver]

You have to install 1.1.20 patch first, then 1.1.21.  You should see the next version in Admin -> Packages.

[margarett]

In any case, please note that 1.1.21 will not solve that problem. You should update, of course, but you need SMF 2.0.x

The sticky in this same board --> http://www.simplemachines.org/community/index.php?topic=534915.0
gives more details