Problem with php and htmldoc

I am currently having a problem with php and htmldoc. I have a php script that queries a myql database and creates a series of tables each with a 800 x 600 product screenshot. The file is then sent to htmldoc to be converted into a pdf file. Here is my problem, if I request ten records (screenshots) or less everything works fine, however, if I request more than ten nothing happens (the php script creates the tables but the pdf file is not created). I have run htmldoc on the command line with the php created html file and it works without any problems regardless of the amount of tables(records). I have tried increasing the max script time and memory usage but it still doesn't work. Any ideas? thanks, Luis R. Lebron lrlebron@home.com