Simple Machines is happy to announce the release of SMF 2.0.7, an update for the SMF 2.0.x product line. This update, amongst other things, brings you PHP 5.5 compatibility. Please update at your earliest convenience :)
dude, download the upgrade package from http://simplemachines.org or directly upgrade 2.0.7 from the admin panel. However, I recommend installing 2.0.7 before installing any mods. Simple Portal 2.3.5 might not be compatible with the 2.0.7 upgrade because of your forum being 1.1.19.
I download smf_2-0-7_upgrade.tar.gz, from Forum 1.1.9 admin dashboard (in "Upload a Package" section), I set full permmision before uploading that file. But the forum said: The package you tried to upload either is not a valid package or has become corrupted.