Can anybody give me suggestion for this error, I have used paperformat in Qweb report and i dont know why i got this error please give some guidelines....

<record id="paperformat_custom" model="report.paperformat">
            <field name="name">Custom format</field>
            <field name="default" eval="True" />
            <field name="format">custom</field>
            <field name="page_height">90</field>
            <field name="page_width">180</field>
            <field name="orientation">Portrait</field>
            <field name="margin_top">30</field>
            <field name="margin_bottom">30</field>
            <field name="margin_left">10</field>
            <field name="margin_right">10</field>
            <field name="header_line" eval="False" />
            <field name="header_spacing">20</field>
            <field name="dpi">100</field>
        </record>

ParseError: "report.paperformat" while parsing /home/umashankar/Uma/Odoo8.0/openerp/addons/b_supplier_report/paperformat.xml:4, near