Eclipse Indigo having problems installing m2e-wtp plugin

I want to install in my eclipse Indigo the plugin m2e-wtp, that allow maven to build .war files.

I tried the using the market place and also the Install software option, but what I get is this:

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In the website https://www.eclipse.org/m2e-wtp/download/ I see a message that says:

Please note that, m2e-wtp and Sonatype's m2eclipse-wtp overlap and can not be installed together.

But I don't understand if is this my case. I checked my installed plugins, and I don't see Sonatype mentioned anywhere, see this image of my m2e installed plugins:

enter image description here

I thought that maybe it was already installed so I tried to import a maven project that requires this plugin from an svn location and also from my local workspace, but it didn't work:

enter image description here

What is missing in my eclipse, why I cant projects that require the m2e-wtp plugin?

Solution

You are not seeing the plugin in your installed plugins because installation failed:

The m2eclipse-wtp project has moved to the Eclipse Foundation. The m2eclipse-wtp plugin is now deprecated in favor of the newer m2e-wtp

Automatic installation from the marketplace has been suspended. m2eclipse-wtp 0.15.3 can be manually installed from http://download.jboss.org/jbosstools/updates/m2eclipse-wtp/

From: http://marketplace.eclipse.org/content/maven-integration-eclipse-wtp

You should install m2e-wtp through Eclipse Marketplace. Just be careful to actully install m2e-wtp and not m2eclipse-wtp (simply search for "m2e-wtp" as some searches actually bring up the old m2eclipse-wtp plugin). The m2e plugins have groupId of org.eclipse.m2e.