You can try to resolve this issue by taking these steps.
Open the following files:
/Sources/Class-Package.php
/Sources/Admin.php
And change the line
@ini_set('memory_limit', '32M');
to
@ini_set('memory_limit', '64M');
in both of them.
You can also try adding this line to your .htaccess file:
php_value memory_limit 64M