Error while installation of vaadin plugin 6.3.4

hello,
I got the following error while trying to install the vaadin plugin as mentioned here: http://vaadin.com/eclipse. Using eclipse 3.4.1

Here is the error log:

The software items you selected may not be valid with your current installation.

Cannot complete the request. See the details.

Unsatisfied dependency: [org.zkoss.eclipse35.services 0.9.6.v200912041237]
requiredCapability: osgi.bundle/org.eclipse.equinox.p2.repository/0.0.0
Unsatisfied dependency: [org.eclipse.platform.feature.group 3.4.1.r341_v20080731-9I96EiDElYevwz-p1bP5z-NlAaP7vtX6Utotqsu]
requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.help.feature.group/[1.0.1.R34x_v20080827-7r7xEIxEI6Zu5nEqN7M3UBpglaat,1.0.1.R34x_v20080827-7r7xEIxEI6Zu5nEqN7M3UBpglaat]

Unsatisfied dependency: [org.zkoss.eclipse.feature.group 0.9.6.v200912041237]
requiredCapability: org.eclipse.equinox.p2.iu/org.zkoss.eclipse35.services/[0.9.6.v200912041237,0.9.6.v200912041237]

Unsatisfied dependency: [org.zkoss.eclipse35.services 0.9.6.v200912041237]
requiredCapability: osgi.bundle/org.eclipse.equinox.p2.repository/0.0.0
Unsatisfied dependency: [org.zkoss.eclipse35.services 0.9.6.v200912041237]
requiredCapability: osgi.bundle/org.eclipse.core.runtime/3.5.0
Unsatisfied dependency: [org.eclipse.platform.ide 3.4.0.M20080911-1700]
requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.platform.feature.group/[3.4.1.r341_v20080731-9I96EiDElYevwz-p1bP5z-NlAaP7vtX6Utotqsu,3.4.1.r341_v20080731-9I96EiDElYevwz-p1bP5z-NlAaP7vtX6Utotqsu]

Unsatisfied dependency: [org.eclipse.rcp.feature.group 3.4.100.r341_v20080814-989JESIEdAciFYfkZZsBfSwQ2341]
requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.ui.workbench/[3.4.1.M20080827-0800a,3.4.1.M20080827-0800a]

Unsatisfied dependency: [org.eclipse.help.feature.group 1.0.1.R34x_v20080827-7r7xEIxEI6Zu5nEqN7M3UBpglaat]
requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.rcp.feature.group/[3.4.100.r341_v20080814-989JESIEdAciFYfkZZsBfSwQ2341,3.4.100.r341_v20080814-989JESIEdAciFYfkZZsBfSwQ2341]

Most of the errors related to some org.zkoss.* plugin. Maybe you should try to remove that?

Thanks, Artur Signell.
I develop with ZK, and some Plugins installed from ZK framework maybe are in conflict with vaadin.
I open a new Eclipse and install the pluguin of Vaadin very well.
It’s works.