Ensure you installed it via the Package Manager and didn't just copy it to the hard drive manually.

Once you have your file (usually a .pkg file) and a console ready for homebrew, follow these steps:

This usually means you are missing the license (RAP) file or your firmware version is too low.

Use a USB stick formatted to FAT32 . PS3s generally cannot read NTFS or exFAT without specific homebrew plugins.

These are installable packages that show up directly on your XMB (XrossMediaBar).