s2 image wont center on page

I am running a site page here as a sales page and the code for the button here

[s2Member-PayPal-Button level=”1″ ccaps=”” desc=”Lifetime Access to Social UMPH Launchpad” ps=”paypal” lc=”” cc=”GBP” dg=”0″ ns=”1″ custom=”socialumph.co.uk” ta=”0″ tp=”0″ tt=”D” ra=”97″ rp=”1″ rt=”L” rr=”BN” rrt=”” rra=”1″ image=”https://socialumph.co.uk/wp-content/uploads/2013/04/67poundbutton1.jpg” output=”button” /]

I have tried all sorts to try abd get it centered but it just does not seem to want to go to the center can anyone help me please