Great thankyou! The padlock symbol is now showing.
Now I just have to apply the embedding code/s to the actual html page and pray that the forum actually embeds.
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Unfortunately the forum is still not embedding into the page/s even with https applied.
This is the embedding code that I used which seems to be in order.
<script type="text/javascript">
nabble_width = "1470px";
nabble_scroll_top = true;
nabble_ignore_title = true;
</script><a id="nabblelink" href="http ://forum.talk-it.net.s1.nabble.com">talk-IT forum
<script src="http://forum.talk-it.net.s1.nabble.com/embed/f1"></script>
Other info:
The forum does show as embedded if http is applied in the address bar (
http://www.talk-it.net ), but this is no good, because visitors will think the site is not secure.