Server error when loging in Joomla

Server error when loging in Joomla

References

Reference NO 1

http://forum.joomla.org/viewtopic.php?t=680899

Reference NO 2

http://stackoverflow.com/questions/8225027/500-internal-server-error-at-back-end-joomla

Reference NO 3

http://www.phoca.cz/documents/16-joomla/336-how-to-enable-displaying-php-errors-on-site

Reference NO 4

http://www.polirant.com/2009/04/joomla-15-500-internal-server-error/

Reference NO 5

http://www.xcloner.com/support/forums/report-bugs/joomla-administrator-error-500-internal-server-error/

Reference NO 6

http://www.akeebabackup.com/home/news/55-general/1482-known-issues-with-j-2-5-5.html

Reference NO 7

http://www.reviewsforjoomla.com/forum/index.php?topic=19057.0

Reference NO 8

http://www.joomlart.com/forums/showthread.php?72076-Error-500-whit-Joomla-2.5&p=378264