Tesla C1060, Win Server 2008 R2, CUDA driver installation fails

Accelerated Computing CUDA CUDA Setup and Installation
1

Hi, I’m having some troubles updating the CUDA driver on a server configured with 4 Tesla C1060. The server is running Windows Server 2008 R2 and the 4 boards are working properly with the driver 320.00 [CUDA 5.5]. However when I’m trying to update the driver to a more recent version (either 333.11 [CUDA 6.0] or 340.84 [CUDA 6.5]) the installation fails generating the following log file:

0.368 |   SYSTEM: [NVI2.NVInstaller] 76@CNVInstaller::PerformSteps : Performing install steps, via module C:\Program Files\NVIDIA Corporation\Installer2\installer.{BDE4F275-7BB4-4705-BF7D-9628BADDC96B}\NVI2.DLL version 2.1002.154.1150 - date "2014-09-12T11:56:56.000" - command ""C:\NVIDIA\DisplayDriver40.84\Win8_WinVista_Win7_64\International\setup.exe"  -log:C:\NVIDIA\setup.log -loglevel:3". 
      0.371 |   SYSTEM: [NVI2.NVInstaller] 82@CNVInstaller::PerformSteps : Running on Windows 6.1.7601 - Arch ID: 9 - Wow-64 check: "true". 
      0.748 |   SYSTEM: [NVI2.NVInstaller] 76@CNVInstaller::PerformSteps : Performing install steps, via module C:\Program Files\NVIDIA Corporation\Installer2\installer.{383C48D9-C7FE-4259-A2DB-B4C20FDB521F}\NVI2.DLL version 2.1002.154.1150 - date "2014-09-12T10:00:55.519" - command ""C:\temp\NVIDIA\ControlPanelInstallerTemp\setup.exe" -s -n -s Display.ControlPanel". 
      0.750 |   SYSTEM: [NVI2.NVInstaller] 82@CNVInstaller::PerformSteps : Running on Windows 6.1.7601 - Arch ID: 9 - Wow-64 check: "true". 
      0.769 |    ERROR: [NVI2.InstallThread] 54@CInstallThread::ThreadProc : Install failed - Exception {0x80070057 - The parameter is incorrect.; File: RelationshipManager.cpp; Line: 1933} - going to fail state. 
      0.770 |    ERROR: [NVI2.NVInstaller] 235@CNVInstaller::PerformSteps : Installation failed with error Exception {0x80070057 - The parameter is incorrect.; File: InstallThread.cpp; Line: 109}. 
    159.379 |    ERROR: [NVI2.NVAppPhase] 708@CNVAppPhase::InvokeApp : Executable failed. 
    159.381 |    ERROR: [NVI2.NVInstaller] 1968@CNVInstaller::InternalPerformInstall : Package "Display.Driver" failed with error: Exception {0xe0e00059; File: PerformInstall.cpp; Line: 3916; Phase failure}. 
2015-04-02 08:50:38.683 (    159.369) |    ERROR: [CPLUtil] 883@CPLUtil::CPLInstallSuccess : Control Panel install result data key not found. 
2015-04-02 08:50:38.689 (    159.375) |    ERROR: [DisplayDriver.DisplayDriverExtSite] 3055@CDisplayDriverExtSite::ConfirmCPLInstall : Uninstalling "Display.Driver" due to the failure of Display.ControlPanel. 
    162.112 |    ERROR: [NVI2.NVInstaller] 2454@CNVInstaller::InternalFinalizePackage : Error Exception {0xe0e00050} while finalizing package. 
    162.114 |    ERROR: [NVI2.NVInstaller] 2014@CNVInstaller::InternalPerformInstall : Failing at package "Display.Driver" failed with error: Exception {0xe0e00059} - aborting install. 
    162.116 |    ERROR: [NVI2.InstallThread] 54@CInstallThread::ThreadProc : Install failed - Exception {0xe0e00059; File: PerformInstall.cpp; Line: 3916; Phase failure} - going to fail state. 
    193.152 |    ERROR: [NVI2.NVInstaller] 235@CNVInstaller::PerformSteps : Installation failed with error Exception {0xe0e00059; File: SimpleThread.h; Line: 228}.

The drivers were downloaded from NVIDIA website (http://www.nvidia.com/download/driverResults.aspx/75457/en-us , http://www.nvidia.com/download/driverResults.aspx/78297/en-us) and the board C1060 should support drivers up to CUDA 6.5 therefore I cannot see the problem. Did anyone encountered the same kind of issues? Any suggestion is well accepted.

Thanks