ParlayX 2.1 Short Messaging - CDRs differntiation

 ParlayX 2.1 Short Messaging generated CDRs for MO, MT and delivery receipts. These CDRs are stored in table slee_charging table.  But there is now way to determine from a record in DB, about the type of CDR. To overcome this I changed the CDR descriptor to include an

additional info (TYPE) in CDR like below. But its not working and i see no additional data apart from 

PluginId=Plugin_px21_sig1_smpp#wlng_nt_sms_px21#4.1.1.0.1

SmppSequenceNumber=4

Size=47

  <!-- MT SMS -->

  <cdr>

    <filter>

      <method>

        <name>SendSmsResponse sendSms(SendSms)</name>

        <class>com.bea.wlcp.wlng.plugin.sms.smpp.SMPPPluginInstanceImpl</class>