Index not being generated on schema update in JBoss

Issue

I am creating an Seam Entity bean. One of the columns will be a target of a search and hence I need to create an Index on it. Found a reference for a Hibernate annotation and tried it.
@Column( name="CALL_NAME", nullable=false )
@NotNull
@Length( max=20 )
@org.hibernate.annotations.Index(name = "CALL_NAME_INDEX")
    public String getName() {
        return name;
    }

However the dynamically created but the index is not. Is there another way?