Web player file access

Hello everyone. The question is pretty simple but I didnt manage to find the answer.

Im building a web app(means using Web Player build) that will take images from the folder on the hard drive and use them as textures on prefab-generated primitives in program.

Files are accesed via file:// protocol using WWW function and are in the subfolder of where the player is.

The problems is - everything works when I run it in the game mode in editor but when building to a web player, the app cant find textures. Are there any restrictions for web player file access or something?

http://unity3d.com/support/documentation/Manual/Security%20Sandbox.html