I've been banging my head against my keyboard with this problem! A couple days ago it worked just fine, however now I cannot login to my Magento Connect Manager. It redirects me to the 404 page of my root folder (magento is in a subfolder).
A little bit about my setup...I have magento installed in a subfolder (public_html/magento)
I have Opencart installed in my root folder (that is currently my live site
I am testing magento in the subfolder and preparing to launch soon).
When I try to login to Magento Connect it redirects me to the 404 page of my opencart site in my root folder.
Some things I have ALREADY tried...Changing permissions of "downloader" folder and it's index.php to 0777, 0755, 0644, etc. Multiple combinations.
Double checked base_url rewrites in my backend config (as well as in the database)
Changing my admin password
Deleting the last extension I had installed before I noticed it stopped working
I'm hoping someone can help me! I have gone through everything I can find on google and unfortunately nothing is working. Any help is greatly appreciated :)