Sometimes files are uploaded by the wrong method ascii/binary with poor ftp clients
The url of one of your images is http://www.plbeane94.com/phpBB2/templat ... er_big.gif
If you put that directly into your browser you get a page/file not found error.
a) you did upload the images directory to the correct place (if you upload the complete phpBB2 directory intact with ftp then this can't happen)
b) If the directory is there then ftp the images to it with your client set to binary.
The truth is out there.
Unfortunately they will not let you anywhere near it!