xsd2code element namespace prefix issue

I am using the xsd2code VS plug-in to create some data classes from a couple of xsd files and I'm having an issue where the namespace prefix for elements in the XSD do not appear in the generated XML files.

XSD:

<xsd:complexType name="ProductMasterItemType">
        <xsd:sequence>
            <xsd:element ref="cmn:PrimaryItemCode"/>
            <xsd:element ref="cmn:NewPrimaryItemCode" minOccurs="0"/>
            <xsd:element ref="cmn:ProductGroupCode"/>
            <xsd:element ref="cmn:ProductStatus"/>
            <xsd:element ref="cmn:EffectiveDate" minOccurs="0"/>
            <xsd:element ref="cmn:RecordStatus"/>
            <xsd:element name="AlternateItemCodes" type="cmn:AlternateItemCodeListType" minOccurs="0"/>
            <xsd:element name="TargetMarketList" type="mdx:TargetMarketListType" minOccurs="0"/>
            <xsd:element name="ItemInfoList" type="mdx:ItemInfoListType"/>
            <xsd:element name="PackagingInfoList" type="mdx:PackagingInfoListType" minOccurs="0"/>
        </xsd:sequence>
    </xsd:complexType>


generated XML:


  -<ProductMasterItem>


    -<PrimaryItemCode xmlns="urn:tracelink:mapper:sl:mdx:commontypes">

    <type>INTERNAL_MATERIAL_CODE</type>
    TestBOM5
    </PrimaryItemCode>

    <ProductGroupCode xmlns="urn:tracelink:mapper:sl:mdx:commontypes">100</ProductGroupCode>

    <ProductStatus xmlns="urn:tracelink:mapper:sl:mdx:commontypes">Released</ProductStatus>

    <RecordStatus xmlns="urn:tracelink:mapper:sl:mdx:commontypes">Active</RecordStatus>


    -<TargetMarketList>


    -<TargetMarket>

    <CountryMarket xmlns="urn:tracelink:mapper:sl:mdx:commontypes">US</CountryMarket>

    </TargetMarket>

    <DeleteTargetMarket/>

    </TargetMarketList>


    -<ItemInfoList>


    -<ItemInfo>

    <LanguageCode xmlns="urn:tracelink:mapper:sl:mdx:commontypes">EN</LanguageCode>

    <ProductDescription xmlns="urn:tracelink:mapper:sl:mdx:commontypes">Test BOM 5</ProductDescription>

    <DrugName xmlns="urn:tracelink:mapper:sl:mdx:commontypes">Nameofadrug</DrugName>

    <Manufacturer xmlns="urn:tracelink:mapper:sl:mdx:commontypes">- No Manufacturer -</Manufacturer>

    <Strength xmlns="urn:tracelink:mapper:sl:mdx:commontypes">verystrong</Strength>

    <DosageForm xmlns="urn:tracelink:mapper:sl:mdx:commontypes">15ml</DosageForm>

    <PackageSize xmlns="urn:tracelink:mapper:sl:mdx:commontypes">40ml</PackageSize>

    </ItemInfo>

    <DeleteItemInfo/>

    </ItemInfoList>

The generated XML doesn't have the 'cmn' namespace prefix for the elements. Did I generate the classes incorrectly when I ran the plug-in? Is this something I need to change in the plug-ins source code?

I don't have a lot of experience working with XML so I apologize if this isn't enough information. If I'm missing something you'd need to know to help answer let me know! Thanks in advance :)