Hello Kelvin,

Thanks for the question about the iFrame not working. This really puzzled us as normally the iFrame should be no issue. However, upon experimenting with the code in a different server, we found that you can fix it in two ways: 1)Remove the "doctype" that's at the top of your code, or 2)change the HEIGHT value to a specific pixel value like "1000px". It's very peculiar, but probably the cleanest way to fix it is simply to remove the "doctype" declaration at the top of your code. If you remove it, you'll see the iFrame working.

I hope this helps to answer your question, please let us know if you require any further assistance.

Arnel C.