Shoutbox

Heyy guys! If you couuld help me out i would greatly appreciate it.  I just downloaded the new plus, and i was looking at the opitions and i clicked " messenger lock" ? not sure if thats exactly what it was called.  I know it was lock though.  Then it closed my messenger, and now when i try to open it nothing happens    Please, please help, i will love you forever.

Jodie