Invalid frame rate?

Used Chickenmans Divx to Dvdr guide did everything the guide says but when i come to load the two files in Spruce Up i get Invalid Frame Rate. And yes i have chose NTSC under the preferences and yes the film was originally 23.976 NTSC and the guide should have converted it to 29.976 NTSC so why wont the file import into spruce can anyone help?

There will a file generated by DVD2SVCD called Pulldown_Encoded_Video_NTSC.mpv, when it detects 23.976fps frame rate, that is the one you load into SpruceUp and not the Encoded_Video_CCE_NTSC.mpv. Both files will be of equal length as well.