Uploading not working

Every time I try to upload anything I get this:

Warning: touch() [function.touch]: Unable to create file /home/coltinato1/domains/coltinator.com/public_html/wp-content/uploads/logonew1.tmp because No such file or directory in /usr/home/coltinato1/domains/techrambles.com/public_html/wp-admin/includes/file.php on line 177

I know this is because I changed my domain from ‘coltinator.com’ to ‘techrambles.com’. The tmp file is placed into a directory that doesn’t exist. I can’t figure out how to change the domain name ‘coltinator.com’ in the directory.