I am new to this system and was just trying to figure a few things out. Why is it that the system won't let me delete this pdf file (WP%20030908.pdf) which when uploaded did not show the pdf file.

The %20 is probably being interpreted as white space (URL encoding). can you rename the file? Are you trying to remove via zymic file manager (or your own)?

If not, try deleting via both ftp and the zymic file manager; still no luck, post your url and directory and an admin will remove it.