I've seen similar posts about this error and have followed suggestions, but can't seem to get this button to function in FIREFOX. The suggestion I was hoping would do the trick didn't work. Here it is: "If you're using Frames in your web site design. For security reasons, PayPal does not allow the use of their payment pages to be displayed inside of a Frame. When a PayPal page is displayed in a Frame, it is unsecure causing it to time out and/or be blocked. You can fix this by simply adding target="paypal" in the tag of the HTML code. This will prevent the PayPal payment page from being displayed in a Frame. " The above solution didn't seem to work. Any suggestion? Click to view MY FULL CODE Thanks!