I am new to openerp , i cant able to enable a button inside the one2many field of wizards, i placed the code below for your reference

openerp>

	<data>

		<record id="test_wizard" model="ir.ui.view">

			<field name="name">Test Wizard</field>

			<field name="model">test.wizard</field>

			<field name="arch" type="xml">

				<form string="Test Wizards" version="7.0">

					<header>

						<button name="ok_butt" string="Purchase" type="object" />

						<button name="cancel_butt" string="Cancel" type="object" />

					</header>

					<sheet>

						<center>

							<label string="Calculate Total" name="Total" />

						</center>

						<group>

							<field name="s1" />

							<field name="s2" />

							<field name="s3" />

							<field name="s4" />

							<field name="s5" />

						</group>

						<notebook>

							<page string="Students">

								<field name="student_ids">

									<form string="Student Lines" version="7.0">

										<group>

											<field name="name" />

											<button name="confirm" string="Confirm" class="oe_highlight"

												icon="gtk-execute" clickable="True" disabled = "False"/>

										</group>

									</form>

									<tree string="Student lines">

										<field name="name" />

										<button name="confirm" string="Confirm" class="oe_highlight"

											icon="gtk-execute" clickable="True"/>

									</tree>

								</field>

							</page>

						</notebook>

						<footer>

							<button name="test_ok" string="print" type="object" class="oe_highlight"

								icon="gtk-execute" />

						</footer>

					</sheet>

				</form>

			</field>

		</record>

	</data>

</openerp>