You need to terminate the 50 pin dif if I remember correctly. I can look in the manual when I get home but I remember something about mixing the devices, and the CSPPC needs to be terminated as well. My devices are all 50 pin and I have active termination set like this.
Activer terminator= AT
IDE cable 50 pin = ------
68 pin cable = ++++++
Converter = Conv
AT++++CSPPC+++HD0+++HD1+++Conv+++AT(upper pins only)----CD0---AT
