FATAL: Error inserting wctdm24xxp - DAHDI

Slowly trying to get DAHDI to work…

when I enter: modprobe wctdm24xxp

I get this:

FATAL: Error inserting wctdm24xxp (/lib/modules/2.6.18-53.1.4.el5/extra/zaptel/wctdm24xxp/wctdm24xxp.ko): Unknown symbol in module, or unknown parameter

dmesg shows:
dahdi: Detected time shift.
wctdm24xxp: Unknown symbol zt_receive
wctdm24xxp: Unknown symbol zt_qevent_lock
wctdm24xxp: Unknown symbol zt_ec_chunk
wctdm24xxp: Unknown symbol zt_transmit
wctdm24xxp: Unknown symbol zt_alarm_channel
wctdm24xxp: Unknown symbol zt_unregister
wctdm24xxp: Unknown symbol zt_hooksig
wctdm24xxp: Unknown symbol zt_register
wctdm24xxp: Unknown symbol zt_receive
wctdm24xxp: Unknown symbol zt_qevent_lock
wctdm24xxp: Unknown symbol zt_ec_chunk
wctdm24xxp: Unknown symbol zt_transmit
wctdm24xxp: Unknown symbol zt_alarm_channel
wctdm24xxp: Unknown symbol zt_unregister
wctdm24xxp: Unknown symbol zt_hooksig
wctdm24xxp: Unknown symbol zt_register
wctdm24xxp: Unknown symbol zt_receive
wctdm24xxp: Unknown symbol zt_qevent_lock
wctdm24xxp: Unknown symbol zt_ec_chunk
wctdm24xxp: Unknown symbol zt_transmit
wctdm24xxp: Unknown symbol zt_alarm_channel
wctdm24xxp: Unknown symbol zt_unregister
wctdm24xxp: Unknown symbol zt_hooksig
wctdm24xxp: Unknown symbol zt_register

is this somehow leftover ZAPTEL stuff?