I have installed the gallery on a test site on another server and it works fine.
I have compared the settings in the system > system settings and they are identical.
In the error logs there are a lot of errors on the one that doesn't work. The most recent one from re-installing the gallery is:
[2011-11-21 08:44:45] (ERROR @ /connectors/workspace/packages.php) Error caching action map mgr/actions
And before that from a previous attempt to install, remove, re-install I have lots of errors like this:
[2011-11-18 15:10:31] (ERROR @ /connectors/workspace/packages.php) Could not open file for reading: gallery-1.4.0-rc1.transport.zip?revolution_version=Revolution-2.1.3-pl
And a couple instances of this:
[2011-11-18 16:00:56] (ERROR @ /websites/123reg/LinuxPackage21/si/ap/ar/siapartnership.com/public_html/core/model/phpthumb/phpthumb.functions.php : 474) PHP warning: shell_exec() [<a href='function.shell-exec'>function.shell-exec</a>]: Unable to execute 'which convert 2>&1'
Any ideas on what is wrong? Or how to fix it?