Im about to create my first wizzard (in openerp 7) and I wanted some buttons in my footer, but when I add the footer tags, I get the "Error occurred while validating the field(s) arch: Invalid XML for View Architecture!"

So this isn't working:

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="view_company_partnerdetails_wizard" model="ir.ui.view">
            <field name="name">Create Monthly Invoice </field>
            <field name="model">company.partnerdetails.wizard</field>
            <field name="arch" type="xml">
                <form string="My little helper Title">

                    <field invisible="1" name="state" />

                    <group states="step1">
                        <field name="name1" />
                    </group>

                    <group states="step2">
                        <field name="name2" />
                    </group>
                    <footer>
                        <button string="Cancel" class="oe_link" special="cancel" />
                        <button name="action_previous" string="Previous" type="object" />
                        <button name="action_next" string="Next" type="object" class="oe_highlight" />
                    </footer>
                </form>
            </field>
        </record>

        <record id="action_company_partnerdetails_wizard" model="ir.actions.act_window">
            <field name="name">Another helper Title</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">company.partnerdetails.wizard</field>
            <field name="view_type">form</field>
            <field name="view_mode">form</field>
            <field name="view_id" ref="view_company_partnerdetails_wizard"/>
            <field name="target">new</field>
        </record>
        <menuitem name="Helper Menu Title" id="menu_company_partnerdetails_wizard" action="action_company_partnerdetails_wizard" parent="menu_company_parent"/>

    </data>
</openerp>

while this is:

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="view_company_partnerdetails_wizard" model="ir.ui.view">
            <field name="name">Create Monthly Invoice </field>
            <field name="model">company.partnerdetails.wizard</field>
            <field name="arch" type="xml">
                <form string="My little helper Title">

                    <field invisible="1" name="state" />

                    <group states="step1">
                        <field name="name1" />
                    </group>

                    <group states="step2">
                        <field name="name2" />
                    </group>
                    <button string="Cancel" class="oe_link" special="cancel" />
                    <button name="action_previous" string="Previous" type="object" />
                    <button name="action_next" string="Next" type="object" class="oe_highlight" />
                </form>
            </field>
        </record>

        <record id="action_company_partnerdetails_wizard" model="ir.actions.act_window">
            <field name="name">Another helper Title</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">company.partnerdetails.wizard</field>
            <field name="view_type">form</field>
            <field name="view_mode">form</field>
            <field name="view_id" ref="view_company_partnerdetails_wizard"/>
            <field name="target">new</field>
        </record>
        <menuitem name="Helper Menu Title" id="menu_company_partnerdetails_wizard" action="action_company_partnerdetails_wizard" parent="menu_company_parent"/>

    </data>
</openerp>

Thanks for your help!