Uploading Images PROBLEM!!

Hey guys,

I’m getting a random problem every time I try to upload an image to articles we post (hoops-nation.com)

It says:
“Warning: copy(/home/hoopsnat/public_html/wp-content/uploads/2012/06/bynum-3.jpeg) [function.copy]: failed to open stream: Permission denied in/home/hoopsnat/public_html/wp-admin/includes/file.php on line 348”