Failed to update unity web player.

I have installed Unity web player 4.0.1f2.I want to play “Motorcross Nitro” on miniclip.com.But whenever i try to play it it says on loading screen: “Failed to update unity web player, Errors Details, Install Manually” when after installing unity web player i run the game the downloader just pops up and give me file to download named “UnityPlayer3.x.x-win32”.i extracted the file and put it into "C:Documents and SettingsyaqoobLocal SettingsApplication DataUnityWebPlayerplayer,but it’s no use. when i click on error deatails it tells me that a new version of unity player is availaable but autoupdate failed.I tried to manually update it from “C:Documents and SettingsyaqoobLocal SettingsApplication DataUnityWebPlayer”.but it does not work. when i click on install manually it takes me to Unity Real-Time Development Platform | 3D, 2D, VR & AR Engine. i installed it manually from there but still did not work. I cleared the cache of chrome and Firefox a lot of times. My PC specs are: Pentium4 CPU 3.2 GHz 1 GB memory Express chippest family VGA 128 mb Windows XP service pack 2 Directx 9.0

How i fixed it.

Are you using IDM?

If yes, you should disable any IDM browser extensions

Or go to IDM configuration ->General TAB

Under “Capture downloads from the the following browsers” , deselect the browser you use to play your unity game.
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