Images not showing

Hi

I hope you can help. I know it's not related to your services and products but I know you know and therefore the liberty. Also my request on the wordpress.org forums has been ignore to date.

Here's my story hope you can help.

I have installed a multi site on one of my previously "std" single install wordpress sites and am now having problems with images not showing.

My file upload url is http://directory.spiritpathwaysfoundation.com/files
I have uploaded an image here http://directory.spiritpathwaysfoundation.com/files/2010/08/directory.jpg but it's not available. Or

It exists and it does not exist.... It does not exist at the above url but when I click on edit image in the Media manager I can see it. The best way to explain is to look at the screenshot

1) Edit Image (visible) http://spiritpathwaysfoundation.com/temp/editmediaedit.png
2) Thumbnails of images (blank)http://spiritpathwaysfoundation.com/temp/editmediafrontpage.png

Thank you in advance MWMUDEV Team.

Johan