Rollback not working using rollback tag

My Changelog xml:


<databaseChangeLog xmlns=“http://www.liquibase.org/xml/ns/dbchangelog

    xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance

    xsi:schemaLocation=“http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd” logicalFilePath=“2014_06_dml_WN.xml”>

<span class=“Apple-tab-span” nothing happens. But when I run the rollback using rollbackcount as 2 it works and both the entries are deleted from databasechangelog and from the table as well. Am I doing anything wrong while creating tag or while doing rollback tag. Please help me on this?