For all the functions to work you need to use the deluxe admin chat that I ported over as well.
* Ported to AMXX by Hell Phoenix
* Hell_Phoenix@frenchys-pit.com
*
* Original created by McKenzie ( mckenzie_cs@gmx.de ) and
* inspired by sank (plugin_sank_chatmode for AdminMod)
* V1.0 May 01 2006 - Released for AMXX
plugin* The following commands can be bound to keys:
*
* amx_saymode
* amx_chatmode
* amx_psaymode
* amx_tsaymode
* amx_csaymode <== deluxe_admin_chat.amxx required
* amx_fsaymode <== deluxe_admin_chat.amxx required
* amx_scrollsaymode <== deluxe_admin_chat.amxx required
* amx_sayymode <-- amx_ejl_adminchat.amxx
* amx_tsayymode <== deluxe_admin_chat.amxx required
* amx_csayymode <== deluxe_admin_chat.amxx required
* amx_fsayymode <== deluxe_admin_chat.amxx required
* amx_scrollsayymode <== deluxe_admin_chat.amxx required
* EXAMPLE (Clientside): bind "o" "amx_tsaymode"
source