cmd paste ok, cmd copy doesn´t work

[R. Hillen]

Hello,

long times ago, I remember, I could copy from and paste into a field of a OS X - Standalone.
Now only (cmd) paste works; cmd (copy) doesn´t work. 

Why???   May you help?

(Mac OS X 10.8, Livecode 4.6.3).

Thank you,
Richard.