USB stick won't play in Playstation 3

[LenVine]

I have a USB stick with various video files on it, AVI, MP4 and WMV, and they all play perfectly when I put the stick in the USB input of my Blu-ray player, but when I put the same USB stick in my Playstation 3, and click on USB Device, I get the message "There are no titles".
Why is this, and how can I get my Playstation 3 to read the video files ?

[LenVine]

I got an answer from Lou.
He said to make a folder called VIDEO in capital letters, and put the required file into it, which I did,
I sent the folder to the USB stick, and put it in my PS3.
It recognized the VIDEO folder. I clicked on it, and my file showed up. I clicked on the file, and it played.

Thanks again, Lou.

[LouBruno]

Glad it worked!