JW,
If you look at this entire thread, you will see a post by Howard Miller around 3/22/07 (depending on time zone; for those using the European dating format that's 22/3/07 
) that suggests doing what the FAQ says at http://docs.moodle.org/en/Installation_FAQ#Why_is_a_particular_page_blank_or_incomplete.3F
Have you tried that? If so, what error log entry do you find?
RLE