Followed instructions for network/multisite – not working

Basically, I’m trying to get multisite up and running and believe I’m following everything to the letter, but not getting the results I believe I should be seeing.

The first instructions I come across tell me I need to add the following line to my wp-config file:

define('WP_ALLOW_MULTISITE', true);

Then to upload that and overwrite my existing config file. So, I download the config, make a backup, add that line, save and upload to overwrite.

Then I go into my admin panel and go to Tools – Network, where I’m told to set this up I first need to deactivate all my plugins. I do this.

Then it says I need to add two lots of code, one to the wp-config and one to web.config

So again, I back up, do what I’m told to do with the code and overwrite.

Log out, log back in, and the “Network” option is gone from the Tools menu.
—

Next step:

Overwrite both files with the backups. Log out, log back in, there’s Network again, only this time it tells me that I’ve already created a network and need to configure it to complete the process. Again, it just tells me to add the code.

THIS TIME:

I delete the original define('WP_ALLOW_MULTISITE', true); as one of the lines of code that I’m told by WP to add looks similar.

Repeat the process, Network is gone again.

——

Do a little research, I’m told to try /wp-admin/network

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This brings me up the option to add a site, so I create one at

http://www.riptiderocknrollbar.com/chrisskoyles

Where I’m hoping to run another small WP site.

I get an email telling me this has been created and I can now go to http://riptiderocknrollbar.com/chrisskoyles/wp-login.php

So I do, and I get the error message “This webpage has a redirect loop”

Can somebody much smarter than me point out where I’m going wrong in all this? Thanks.