Migrated from localhost to server and cannot get custom_fields content anymore

When you moved the site, did you export and then re-import the content? I’m wondering if maybe the custom data just didn’t make it into the live server’s database.

The first place to look for whether that’s the case would be either on the post’s edit screen or within the database itself with PHPMyAdmin or something similar.

Also, I tend to use get_post_meta() and send the key along as an argument instead of getting all of the values and using the key to pull it from the array like get_post_custom() requires, you might try that and see if that helps.