XP Pro - 'Platform is not Supported' Error

[ajsx]

I'm on XP Pro but I get that error "platform is not supported". I did install the radium vista theme pack but then I uninstalled it again so I don't know what might be causing this. Is there a way to get rid of this annoying problem??

[Copytrooper]

Seems you're using the wrong installer. XP Pro requires x86 version.

[sycomoto]

I Also Run XP, And i ahve tried Both the x's Versions, and i still get a "patform not supported" error, and, i do not have any vista upgrades or anything of that sort etc etc. Do you have any ideas as to why i cannot install?