Need help with iframe code injection on page!

Site URL: https://www.baratatexasrealty.com/property-search

I'm trying to inject a code on a page of the website which displays a property search portal. It should look like this when working correctly: http://www.thebrealtygroup.com/homes-for-sale-search/

I'm trying to paste the code given to me by the client onto this page: https://www.baratatexasrealty.com/property-search but it's cutting it off and not showing on the whole page like it's supposed to. (see images below or view URL's)

Here is the code that was given to us:

<iframe src="https://matrix.ntreis.net/Matrix/public/IDX.aspx?idx=a490eda" width="100%" height="100%" frameborder="0" marginwidth="0" marginheight="0"></iframe>

Can someone help with this? It's also not being responsive like we need. Thank you!!

Edited October 1, 20204 yr by fishhousecreative

Seems fine here. Do you still need help on this?