Getting $craftPath error on server trying to get Craft running Trying to get my Craft site running on my server for the first time.

Getting the error Could not find your craft/ folder. Please ensure that $craftPath is set correctly in /var/www/dev.mysite.com/htdocs/public/index.php

However, there is nothing different to the folder structure on my server than I have locally. 
i.e. the $craftPath set in index.php is still ../craft which is correct... my Craft folder sits beside my public folder as per default installation.

What can I try to get this working?
9 times out of 10, if you're absolutely sure the path is correct, it's either a permissions issue (PHP doesn't have permissions to open the craft folder) or your php.ini file has  open_basedir restrictions in place preventing PHP from accessing the folder.