Unable to import/export custom extension file from PUC.

Hello Community,

I am developing on plugin in that i have custom extension file called ".pin". I have configure setting for content type in plugin.xml as well as plugin.spring.xml file.
To import export i set following thing in my plugin.spring.xml file.

<bean class="org.pentaho.platform.engine.core.solution.ContentInfo">
<property name="mimeType" value="text/xml"/>
<property name="extension" value=".pin"/>
<property name="canImport" value="true"/>
<property name="canExport" value="true"/>
<pen:publish as-type="INTERFACES"/>
</bean>

But it didn't work for me.Is there any other configuration to do?

Please help to solve this issue.

Thanks & Regards
Gaurav Ashara