Facing a Issue with Vaadin PagedTable dependency mgmt in gradle

Hi,
I am trying to download the pagedTable add on jar using my gradle build but it is not able to download it.
The repository url we are using below is our local nexus url. Since we have proxy issue, we are using nexus to talk to external sites.
It is working fine for the regular Vaadin Jar file and code is compiling but for PagedTable jar it throws below error -
Any ideas if I am going wrong anywhere ??

Build failed with an exception.

* What went wrong:
Could not resolve all dependencies for configuration ':compile'.
> Could not find group:org.vaadin.addons, module:pagedtable, version:0.6.3.
Required by:
com.magellan:DrugLookupPortlet:1.0

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Below is my build.gradle file.

apply plugin: 'java'

apply plugin: 'war'

group = 'com.magellan'
version = '1.0-SNAPSHOT'
destinationDir = 'C:\\projectsSpringVaadin\\DrugLookupPortlet\\build\\'

sourceCompatibility = 1.5
version = '1.0'

repositories {
maven{
url "http://stlmoj2eed02:28080/nexus-webapp/content/groups/public/"
}
}

dependencies {
compile group: 'commons-collections', name: 'commons-collections', version: '3.2'
compile "com.vaadin:vaadin:6.7.9"
compile group: 'org.vaadin.addons', name: 'pagedtable' , version: '0.6.3'
testCompile "junit:junit:4.+"
}

test {
systemProperties 'property': 'value'
}

uploadArchives {
repositories {
flatDir {
dirs 'repos'
}
}
}