What's the easiest way to create a data entry form for a Quickbase application that I can embed on my website?

I tried to make the form using this tool, and I got this when I tested it on our website:

This XML file does not appear to have any style information associated with it. The document tree is shown below.

<qdbapi><action>API_AddRecord</action><errcode>22</errcode><errtext>Sign-in required</errtext><errdetail>The page you have requested can be viewed only by users who have signed in. Please sign in to proceed.</errdetail></qdbapi>