Configuring Wi-ME for WPA with TKIP security

Has anyone has success with programming a Wi-ME for WPA-PSK with TKIP security? If so, I would appreciate any advice. Here’s a summary of my setup.

customizeGetWirelessParameters();
authen = WLN_AUTH_WPA_PSK
encrypt = WLN_ENCR_TKIP
wpa_psk = <32 characters>
save configuration back to nvram