Esse problema da IDE no STS nao conseguir resolver as classes dos plugins é normal. Pode ignorar.

Bom dia.

Eu estou com erro na instalação do spring-security-core pelo SpringSource Tool Suite.

O erro é o seguinte:

C:\MyProjects\Twitter>grails install-plugin spring-security-core-1.2.1
Welcome to Grails 1.3.7 - http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: C:\Softwares\grails-1.3.7

Base Directory: C:\MyProjects\Twitter
Resolving dependencies...
Dependencies resolved in 1765ms.
Running script C:\Softwares\grails-1.3.7\scripts\InstallPlugin.groovy
Environment set to development
Resolving plugin spring-security-core-1.2.1. Please wait...

:: problems summary ::
:::: WARNINGS
module not found: org.grails.plugins#spring-security-core-1.2.1;
latest.integration

==== grailsPlugins: tried

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

C:\MyProjects\Twitter/lib/spring-security-core-1.2.1-[revision].zip

D:\Documents and Settings\alex\.grails\1.3.7\projects\Twit
ter\plugins\hibernate-1.3.7/lib/spring-security-core-1.2.1-[revision].zip

D:\Documents and Settings\alex\.grails\1.3.7\projects\Twit
ter\plugins\tomcat-1.3.7/lib/spring-security-core-1.2.1-[revision].zip

==== grailsHome: tried

C:\Softwares\grails-1.3.7\lib/spring-security-core-1.2.1-[revision].xm
l

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

C:\Softwares\grails-1.3.7\lib/spring-security-core-1.2.1-[revision].zi
p

==== grailsHome: tried

C:\Softwares\grails-1.3.7\dist/spring-security-core-1.2.1-[revision].x
ml

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

C:\Softwares\grails-1.3.7\dist/spring-security-core-1.2.1-[revision].z
ip

==== grailsHome: tried

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

C:\Softwares\grails-1.3.7/plugins/grails-spring-security-core-1.2.1-[r
evision].zip

==== grailsCentral: tried

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

http://svn.codehaus.org/grails-plugins/grails-spring-security-core-1.2
.1/tags/LATEST_RELEASE/grails-spring-security-core-1.2.1-[revision].zip

==== grailsCore: tried

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

http://svn.codehaus.org/grails/trunk/grails-plugins/grails-spring-secu
rity-core-1.2.1/tags/LATEST_RELEASE/grails-spring-security-core-1.2.1-[revision]
.zip

==== mavenCentral: tried

http://repo1.maven.org/maven2/org/grails/plugins/spring-security-core-
1.2.1/[revision]/spring-security-core-1.2.1-[revision].pom

-- artifact org.grails.plugins#spring-security-core-1.2.1;latest.integ
ration!spring-security-core-1.2.1.zip:

http://repo1.maven.org/maven2/org/grails/plugins/spring-security-core-
1.2.1/[revision]/spring-security-core-1.2.1-[revision].zip

::::::::::::::::::::::::::::::::::::::::::::::

:: UNRESOLVED DEPENDENCIES ::

::::::::::::::::::::::::::::::::::::::::::::::

:: org.grails.plugins#spring-security-core-1.2.1;latest.integrat
ion: not found

::::::::::::::::::::::::::::::::::::::::::::::


:::: ERRORS
Server access Error: Connection timed out: connect url=http://repo1.mave
n.org/maven2/org/grails/plugins/spring-security-core-1.2.1/maven-metadata.xml

Error resolving plugin [name:spring-security-core-1.2.1, group:org.grails.plugin
s, version:latest.integration].
Plugin not found for name [spring-security-core-1.2.1] and version [not specifie
d]


Alguém já teve este erro? Como resolvo?
Obrigado.