WebPlayer and .exe not working?

Hi, me and a friend are making a game so he got Unity Pro, the problem is that when he sends me a test it says “The content was stopped because a fatal content error has been detected.”, it was a web player test so I asked him for an .exe and the following message appeared:
"Oops!

The game crashed.
The crash report folder named “folder name” next to game executable.
It would be great if you’d send it to the developer of the game!"

But these tests works on other computers… (The data folder is in the same folder as the .exe also)
Any solutions?

Thanks.

Fatal content errors usually mean a file that Unity is reading is corrupt. Check that the files in the Data folder are all the correct size.