I Have using an LG UF6800

I' don't see application playZ Media on my USB Key format FAT32 on MyApps

http://playz.sithari.com.au/files/test-help.html
I try :

Try installing on a different USB drive
Ensure the drive is formatted as FAT32
Unplug all other drives and try again
Ensure you are logged in to the TV with your LG account
Go to the forum pages for other options people have found worked for them

Thanks for help :)