Trouble uploading pictures…

I recently switched servers and had a tough time getting all blog files loaded correctly, but finally did.

Now in making my first blog post in the new server I am trying to upload an image and get…

Unable to create directory /home/performb/public_html/blog/wp-content/uploads/2006/11. Is its parent directory writable by the server?

What do I need to do to get images in my posts again?