Change the file permissions to be server-writable?

This setting varies from webhost to webhost. In the past, I've used iPowerWeb, and they required file permissions of 777 in order to be server-writable. Currently, I use Dreamhost, and they need permissions to be set to 755 to be server-writable. Again, if you're not sure, either go ask your host or you can try various settings yourself. The three to try are 755, 775, or 777.

The specific process of how you change your file permissions differs from FTP application to FTP application.

On Windows I use FlashFXP, and this is the process I use:

1. Find the remote file or folder that you want to change the permissions of
2. Right-click on it.
3. Choose Attributes (CHMOD)
4. Try 755, 775, and 777 in order until you find one that works.

Your specific FTP application will most likely be something similar.

On Mac OS X I use Transmit, and this is the process I use:

1. Find the remote file or folder that you want to change the permissions of
2. Right-click (or Ctrl-click for you one-button-mousers) on it
3. Choose Get Info.
4. Try 755, 775, and 777 in order until you find one that works.

Your specific FTP application will most likely be something similar.

Once you have the files set up on your Linux box, and assuming you can SSH into the box to access your SimplePie files:

1. Navigate to the directory above your cache directory.
2. Type chmod -Rf 755 ./cache.
3. If that doesn't work, try 775, then 777 in order until you find one that works.