Ok, blackbuddy,
I tried the same as you.......I typed in some text which the site converted into a .wav file for me.
I downloaded the .wav file and checked that the .wav file was 16 bit mono, then converted it to a .lip file with WavToLip.
Everything worked just fine, I now have a lip file to go with my .wav file.
All I have to do now is convert the .wav file into an .ogg file and put the .ogg and .lip together wherever I want them.
Planck