XI - Receiver Determination Condition not working

Question

I created a Condition on my Receiver Determination to stop some messages from being sent based on a field in our message.
It works when using some test tools (workbench, SOAPUI, etc) but not when coming from our MDM system.  The beginning of the input message looks like what is listed at the bottom of this message(and it works).
But when coming from MDM the one node looks like this  - there is no colon ( after the xmlns.
               <YMDMB_CREMDM xmlns='http://intel.com/MDM/BUPA/Vendor'
without the colon ( the condition does not work;  with the colon it does work.
the sending system is not able to add the colon. 
Does anyone know why the colon matters and what we can do to get around it in XI ??
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?><!-- Receiver Grouping -->
<YMDMB_CREMDM xmlns:='http://intel.com/MDM/BUPA/Vendor' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
   <IDOC BEGIN='1.0' xmlns=''>

Answer 1

below is the beginning of the XSD from the IDOC (it is custom but based on a SAP one  - just added a few fields)
I also put the start of the input message below that.
also to make sure I was clear, if all we do is change this node of the input message by adding a colon after the xmlns everything works.
               <YMDMB_CREMDM xmlns='http://intel.com/MDM/BUPA/Vendor'
thanks
begging of XSD from IDOC
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
     <xsd:element name="YMDMB_CREMDM">
          <xsd:complexType>
               <xsd:sequence>
                    <xsd:element name="IDOC" type="YCREMDM.YMDMB_CREMDM" />
               </xsd:sequence>
          </xsd:complexType>
     </xsd:element>
     <xsd:complexType name="YMDMB_CREMDM.E1BPADTTX">
here is beginning of input message
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?><!-- Receiver Grouping -->
<YMDMB_CREMDM xmlns='http://intel.com/MDM/BUPA/Vendor' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
   <IDOC BEGIN='1.0' xmlns=''>