.net Framework 3.5 won't install on Server 2003 SP2 x64

When installing the .NET 3.5 framework on a Windows 2003 SP2 x64 VPS I got these errors, using the web or full installer:

[09/19/10,11:07:29] XPSEPSC x64 Installer: [2] Error code 1603 for this component means "Fatal error during installation.
"
[09/19/10,11:07:29] XPSEPSC x64 Installer: [2] Setup Failed on component XPSEPSC x64 Installer
[09/19/10,11:07:30] WapUI: [2] DepCheck indicates XPSEPSC x64 Installer is not installed.
[09/19/10,11:14:54] XPSEPSC x64 Installer: [2] Error code 1603 for this component means "Fatal error during installation.

I also found the info: The installation of the XPSEPSC component requires that the Print Spooler Service be running in the "Started" state. If the Print Spooler Service is not running, the XPSEPSC installer will fail.
To install .NET 3.5 framework on a windows virtuozzo container, perform these steps for a successfull installation:

1 delete the C:\windows\system32\catroot\ folder
2 Start the print spooler service
3 Run the .NET 3.5 SP1 installer