Make sure you have the zeno keyboard selected as the keyboard. I just tried it on our test unit and it worked fine. Outside of that I don't have any ideas as that is the way Microsoft wrote the OS on the device.
I went under the settings for the treo and selected the zenokeyboard and nothing changed but when I went to type in data in ADPL and the keyboard popped up, I selected the arrow next to the keyboard icon and then selected the zenokeyboard and now it works like a charm. Thanks for the help.