Problems with uploading media files

Hi! I have a problem with uploading files to my posts.
I have just changed my provider and domain name, so i transfered my blog to a new domain. Now everything seems to be working besides Media Library. I can not upload any files, after uploading i see this “Unable to create directory /www/anasta02/www/htdocs/blog/wp-content/uploads/2010/05. Is its parent directory writable by the server?”, where /www/anasta02/www/htdocs/ – the path to the blog directory on my old hosting.
Where should I change this path?