What device are you using? If it's an older device, it may no longer be able to handle the resource hog CS has become. Are you updated to IOS version 8.3?
If you have a password for the game,(should be the one you used to get on the forum), you can login to the game on a newer, different device by using the login feature available in RS, BS & a few other TL/S8 games. Instructions are in The Hub if you need them.