h all i have a wizard on which i have already two buttons and i want to add a third one using xpath,,but somehow its not working,,,,the buttons there are added by following code

<footer> 
                        <button string = "Save" type = "object" class = "oe_highlight" name = "write" /> 
                        <button string = "Cancel" class = "oe_link" special = "cancel" /> 
 </ footer>

and am giving xpath as:

<xpath expr = "// button [@ name = 'write']" position = "before"> <button string = "Save and Print" type = "object" class = "oe_highlight" name = "write_company_and_print_report" /> </ xpath>

whats the problem plz?