How to Provision Managed Metadata column

I am trying to provision a managed maetadata field using a feature. The field defination looks like :

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Field ID="{749DA0D1-4649-4C25-871B-05F0C07221FC}"
         Type="TaxonomyFieldType"
         DisplayName="Country"
         ShowField="Term1033"
         Required="TRUE"
         EnforceUniqueValues="FALSE"
         Group="_Custom"
         StaticName="Country"
         Name="Country"/>
</Elements>

After provision the column it looks disabled. Am I missing some configuration or steps?