Web/Admin not accesible after upgrading from 2.5.27 to 3.3.6 - Joomla! Forum - community, help and support

i downloaded joomla_3.3.6-stable-update_package.zip , tried upgrading joomla 2.5.27 via extension manager. when pressed upload&install, uploaded package after dissapeared.

the website isn't working anymore, , cannot access administrator interface either.

when try accessing of them gives me next error:

http 500 internal server error - website visiting had server problem prevented webpage displaying.

for more information http errors, see help.

can restore anything? or @ least can menu structures , informations website? via ftp maybe, or anything. didnt know joomla fragile .zip file can damage completly.

any highly apreciated. thanks

if use akeeba backup (and backed before upgrading (?!) ) can use akeeba kickstart restore 2.5.27 site , try upgrade again.

the site structure , content stored in database, there no files can download produced on fly db.

you can export data, myphpadmin or similar tool through hosting control panel.

please take note of following: ensure have minimum requirements 3.3.6:
http://www.joomla.org/technical-requirements.html (check hosting provider).

did review instructions; upgrade 2.5.27 3.3.x.
http://docs.joomla.org/j2.5:upgrading_f ... ng_version

try download full download package of 3.3.6, unzip package , upload files again, server overwriting files there. may restore site working order (be careful not overwrite config.php file, or if do, update correct database information afterwards)

another thing check file , folder permissions: chmod 644 folders, chmod 755 files.

the http 500 error indicates configuration issue on server (including above-mentioned file permissions) may best check hosting provider see can suggest.

i'd ask host check system requirements (point them joomla's requirements if necessary) , have them update if can). ask them check php error logs , php.ini settings.