Video Thumbnail Pic Not Showing

If I load a video and it's thumbnail jpg picture from my comuter into vshare, no problems. When I use the embedded url and a jpg thumbnail from my computer, the thumbnail doesn't show up on the main page, It just shows a no thumbnail picture.
Also, where can you edit the thumbnail picture after the video's posted? I see where you can edit the video but there wasn't a place to edit the thumbnail picture.

Thanks

It may be problem with accessing to image url. Try a different image url and see if that works.

What is the image url you are trying to use ?

I'm not at my home desk (at the office right now) but I didn't use a URL. I used the 'select from computer" option for the image.

i'm having the same problem,img url wroking,the problem with the img uploaded from pc.