This is probably a config setting so first check the files warpcore/setup/config/config.php and warpcore/admin/config/config.php. Both have a common set of configuration varables set that set the URI protocol.
Open both files and look for the URI PROTOCOL section and manually set the $config['uri_protocol']
to one of the suggested flavors. I would recommend starting with QUERY_STRING by assigning that variable directly below the flow control statement like:
$config['uri_protocol'] = "AUTO";
if (strpos($_SERVER['SERVER_SOFTWARE'], 'IIS') !== false)
{
$config['uri_protocol'] = "QUERY_STRING";
}
$config['uri_protocol'] = "QUERY_STRING";
Be sure to do this in both files and if QUERY_STRING doesn't work try sequentially one of the other 5.