Even if I'm logged in as Admin I tried it and ... it did'nt work 8-(

Thanks for the tip though John.

>right click on the exe and run as Administrator. That should do it for you.
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>>When I try to install Infragistic NetAdvantage for .Net I receive an error message.
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>>I followed everything mentioned for Vista (UAC and IIS) but still I get the following error
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>>Error 1609. An error occured while applying security settings. Administrator is not a valid user or group. This could be a problem with the package, or a problem connecting on a domain controller on the newtwork. Check your network connection and click Retry or Cancel to end the install.