CCE 2.5 checksum error?

[jhs555]

I am using DVD2SVCD and everything works fine until the CCE 2.5 portion of the program. The CCE gets about 20% complete and I get and error-

CCE encoding failed: ERROR: Video check-sum is different from that of previous pass.
Source video data time code may be different please check video tape or the information file

--information--
current: check sum = 007d8e4c
previous: checksum = 007d8e49

can anyone pleaes help??

-JHS-