Form hidden values

I’m trying to implement WorldPay on my site using the code below:

<form action=”https://secure-test.worldpay.com/wcc/purchase” method=POST>
<!-- This next line contains the testMode parameter - it specifies that the submission is a test submission --> <input type=”hidden” name=”testMode” value=”100”>
<!-- This next line contains a mandatory parameter. Put your Installation ID inside the quotes after value= -->
<!-- You will need to get the installation ID from your Worldpay account. Login to your account, click setting and under installations you should have an option called select junior and a number, put the number between “” e.g. “123456”-->
<input type=”hidden” name=”instId” value=”Your installation ID“>
<!-- Another mandatory parameter. Put your own reference identifier for the item purchased inside the quotes after value= --> <input type=”hidden” name=”cartId” value=”Your ID for the product”>
<!-- Another mandatory parameter. Put the total cost of the item inside the quotes --> <input type=”hidden” name=”amount” value=”10.99“>
<!-- Another mandatory parameter. Put the code for the purchase currency inside the quotes after value= --> <input type=”hidden” name=”currency” value=”GBP”>
<!-- This creates the button. When it is selected in the browser, the form submits the purchase details to us. --> <input type=submit value=” Buy This “>
</form>

But as you can see, the values are showing and the button doesn’t display properly, even though it’s in a code block.

https://www.ofas.org.uk/world-pay/

Any ideas?