Assistance with basic HTML headers/ColdFusion code to force page reload even when 'Back' button is used

We have developed a "secure" payment site in ColdFusion. A user can enter credit card information to complete a payment. Problem is, after logging out, the user is still able to use his/her 'back' button on the browser to go back and view the credit card information just entered. We have tried the HTML headers such as 'no-cache' and 'expires', but are not having any luck. ## Deliverables Rent A Coder requirements notice: As originally posted, this bid request does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite. 1) Phone/email support 2) Reviewing a few lines of code and making suggestions on how to force the page to reload when using the back button. ## Platform ColdFusion - IIS 6.0