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A solution I found to this problem is by adding a php.ini file in the root of your magento installation, and adding the following code in it:
memory_limit = 256M
max_execution_time = 18000
magic_quotes_gpc = off
flag session.auto_start = off
zlib.output_compression = on
suhosin.session.cryptua = off
zend.ze1_compatibility_mode = off
extension=mcrypt.so
extension=pdo.so
extension=pdo_sqlite.so
extension=sqlite.so
extension=pdo_mysql.so
zend_extension=”/usr/local/Zend/lib/Optimizer-3.3.9/php-5.2.x/ZendOptimizer.so”