Grails Mail Plugin doesnt install - try to fix in Config but still doesnt work

I need to install the mail plugin for grails. The console shows the following error:

Failed to install plugin [mail-1.0-SNAPSHOT]. Plugin has missing JAR dependencies.

I tryed to fix some things in the buildconfig.groovy according to guides to this problem I googled, but it keeps showing this error message above. Things I inserted into the buildconfig.groovy

dependencies {

    compile "javax.mail:mail:1.4.3"
    runtime "org.springframework:org.springframework.test:3.0.3.RELEASE"

    runtime( ':mail:1.0-SNAPSHOT' ) {
    excludes "sp开发者_运维百科ring-test"}


}

the plugin doesnt install (I tried to install it from the "run target" console. Can somebody help pleas? thanks a lot, Daniel

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Can you trying installing version 0.9 ? I know that works for us.

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Just a shoot from the hip: is mavenCentral() uncommented in the repositories section?