Buenas amigos, cuando quiero instalar el framework 3 me da error, me salta esto

[05/21/10,16:10:12] Analizador de MSXML 6.0: [2] Error: Installation failed for component Analizador de MSXML 6.0. MSI returned error code 1618
[05/21/10,16:10:32] WapUI: [2] DepCheck indicates Analizador de MSXML 6.0 is not installed.
[05/21/10,16:10:33] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.0 was not attempted to be installed.
[05/22/10,04:45:01] Microsoft .NET Framework 2.0: [2] Error: Installation failed for component Microsoft .NET Framework 2.0. MSI returned error code 1603
[05/22/10,04:45:23] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0 is not installed.
[05/22/10,04:45:24] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.0 was not attempted to be installed.


a ver si alguien por ahi me ayuda a darme cuenta como instalarlo, tengo en la maquina el win xp ue6. Gracias, saludos!!!!!!!