[i] CPU:- 600-megahertz (MHz) Pentium III-compatible or faster processor; 1-gigahertz (GHz) or faster processor recommended
OS:- Microsoft Windows 2000 Server with Service Pack (SP) 4 or later; Windows 2000 Professional with SP 4 or later; Windows XP with SP 2 or later; Windows Server 2003 Standard Edition, Enterprise Edition, or Datacenter Edition with SP 1 or later; Windows Small Business Server 2003 with SP 1 or later; Microsoft Windows Server 2003 Standard x64 Edition, Enterprise x64 Edition, or Datacenter x64 Edition with SP 1 or later; Windows XP Professional x64 Edition or later running in Windows on Windows
Memory:- 512 megabytes (MB) of RAM or more; 1 gigabyte (GB) or more recommended
HDD:- Approximately 350 MB of available hard-disk space for the recommended installation
Approximately 425 MB of additional available hard-disk space for SQL Server Books Online, SQL Server Mobile Books Online, and sample databases
Drive:- DVD-ROM drive
Display:- Super VGA (1,024x768) or higher-resolution video adapter and monitor
Other Devices:- Microsoft Mouse or compatible pointing device
Other Requirements:- Microsoft Internet Explorer 6.0 SP1 or later
For Reporting Services, you need Microsoft Internet Information Services (IIS) 5.0 or later, and ASP.NET 2.0 or later[/i]
If you have just installed XP you will not have IE6 or higher and unlikely to have already installed Internet Information Services 5 or higher as well as the .Net 2 or latter Framework.
If you do not have the minimum Hardware Requirements it's not going to work either. ;)
Col