Your SWFs aren't edited or linked correctly. Try your swfs/gamedata/external_variables.txt and swfs/gamedata/external_override_variables.txt and make sure they are edited with your link if you are on localhost/127.0.0.1 make sure the link is localhost/127.0.0.1; also make sure they are linked to...
Open developer tools; something isn't linked correctly. Make sure you edited your client.php correctly and edited your SWFs correctly (external_variables.txt and external_override_variables.txt)