I've had a Drupal 7 site on a One.com domain for a long period. I now need the domain for a Shopify site and have therefore made a redirect to Shopify. For the subdomain I've made a folder called drupal. The drupal installation should now be available at drupal.mydomain.com which works fine.
The problem is that I'm no longer able to log into the site. I get an access denied everytime. I'm not able to request new passwords as I'm just "redirected" to the same page again.
I've removed all cookies and emptied all cache and session tables. I use clean urls and a .htaccess file which I have not modified. I have tried to create a folder in sites/ called drupal.mydomain.com (copy of default/), but that hasn't helped. I only have ftp access to the server and can't create softlinks. I do have connection to the database, and my denied accesses are logged in watchdog.
I've searched Google for a week now, and have had help from friends, but without success. Can anybody here help me, please?