This is a bit vague. Have you checked that the quotes ‘ ‘ are straight and not the slanted ones that sometimes appear if you have copied the code from a word document or online.
I’ve adapted my wp-config to show you what your config should be like: http://pastebin.com/m4dqDGBC
This is my .htaccess file: http://pastebin.com/KNwsTEGE
Remember this is for a directory install and sub domains are a bit different. Change the details as needed in the wp-config.php. I’ve made new salt keys, so you are fine to use these.
Please provide an URL if you can and a multisite type and I’ll try my best to help you.
Thanks for the help. But, I have read more and decided I didn’t need multisite.