XF 1.4 Linking to the Add Reply Page results in error

I'm attempting to add links in one of my templates that goes directly to the Add Reply page. The link would be:
<a href="{thread URL}/add-reply">text</a>
However, when I click on this link, I get an error that the page can only be accessed via the POST function (a form). Is it not possible to do this with a simple <a> tag? Thank you.