[KWo]

Please check if in Your podbot.cfg there is a line:
pb_chat 1
(0 means chating disabled, 1 - means enabled).
I was testing it yesterday and it was working for me. The only thing - You need to wait about 5-7 seconds until they will reply. They are replying when they are dead, but You have to be dead, too. Otherwise CS is blocking seeing messages by alive/dead players. Alive player can talk to alive player, dead player can talk to dead player.