Error launching Unity Player. Invalid Unity Web file (Decompression Failure)

I made a unity game. Then i clicked File>Build Settings>Web player.
Unity asked me to select the folder. I chose the folder and there it created two files, game.html and game.unity3d
I opened my FTP and transferred these two files to my website.
When i open my game it gives this error “Error launching Unity Player. Invalid Unity Web file (Decompression Failure)”.
Please can someone help me…

did you set type to binary before uploading it?