Are you trying to send the map via CECI (viz. your first post) or via program (viz. your second post)?
Trouble shooting ideas:
1. Is the terminal locked? If so, can it be reset and the clear key hit?
2. Are there any relevant messages in the message log?
3. Are there any relevant messages in the CICS system log?
4. Are there any relevant console messages?
5. How is the terminal defined to CICS (24x80, 43x80, ... )?
6. How is the map defined (24x80, 43x80, ...)?
7. How is the terminal emulator (PC3270, REFLECTION, HUMMINGBIRD, or whatever) defined (24x80, 43x80, ....)?
8. Is there a lighthning bolt at the bottom of the screen? If so, there will be a VTAM error code associated with it (such as 505) -- what is that error code?