Please see this FAQ which describes your scenario and might help:
When I view my gallery online, I see a blank area. Why?

Also, please see the note regarding Embedding Using Dreamweaver in the SimpleViewer Embeddign Guide.

If the information in the links above does not help and you continue to experience difficulties, then please post the URL to your gallery's web page so that I can see the problem for myself.
Once I am able to see your gallery's embedding code, I should be able to determine the cause of your problem and hopefully suggest a solution.

Your http://hannahousebandb.net/photos.htm page includes the following line of code:

<script type="text/javascript" src="svcore/js/simpleviewer.js"></script>

Therefore, your 'simpleviewer.js' file should be located at this location on your web server: http://hannahousebandb.net/svcore/js/simpleviewer.js
... but going directly to that location in a web browser results in an error 404 (file not found).
It looks like your gallery's 'svcore' folder has not been uploaded to the correct location on your web server.
It should be uploaded (along with all the other contents of your gallery folder) to the same directory as the HTML page containing the gallery's embedding code (in your case your root directory) as noted in Step #2 of the Embedding into a HTML Page instructions.

Alternatively, if you have uploaded your complete gallery folder to somewhere on your web server, then you could leave it where it is and use the baseURL method of embedding as documented here. Just change the path to the 'simpleviewer.js' file and use a baseURL in your embedding code to point towards the gallery folder.

Your screenshot looks like a view of files on your computer's hard drive (rather than a view of files on your web server).
Have you uploaded the gallery files to your web server?

The problem is that your 'simpleviewer.js' file is not located on your web server where it should be.
Try going to this location in a browser: http://hannahousebandb.net/svcore/js/simpleviewer.js
You should see the JavaScript code but, instead, you will see an error 04 (file not found).

If you upload the contents of your 'SimpleViewer' folder (as shown in your screenshot) to your web space's root directory (alongside your 'photos.htm' page), then your gallery should display in your 'photos.htm' page.

Your latest screenshot shows the cause of the cause of the problem. You have uploaded your complete gallery folder (named 'SimpleViewer') to your web server but the embedding code you use does not tell SimpleViewer to look inside this folder for the 'simpleviewer.js' file.

There are two solutions to this problem:

(1) Leave your embedding code exactly as it is and copy the contents of your 'SimpleViewer' gallery folder to your 'public_html' directory (the directory with the HTML page which contains the embedding code). Please be careful if doing this in case you have any files there with the same filenames which might be overwritten by this process. Take a backup first if you are unsure.
This method of embedding is documented here.

... or:

(2) Leave your 'SimpleViewer' gallery folder exactly where it is and use the baseURL method of embedding as documented here.
You will need to add the 'SimpleViewer' folder to the path of the 'simpleviewer.js' file and add a baseURL within the embeddign code to point towards the 'SimpleViewer' gallery folder.

<!--START SIMPLEVIEWER EMBED.-->
<script type="text/javascript" src="/SimpleViewer/svcore/js/simpleviewer.js"></script>
<script type="text/javascript">
    var flashvars = {};
    flashvars.baseURL = '/SimpleViewer/';
    simpleviewer.ready(function () {
        simpleviewer.load('sv-container', '100%', '100%', '333333', true, flashvars);
    });
</script>
<div id="sv-container"></div>
<!-- END SIMPLEVIEWER EMBED -->

Either of these two solutions would work fine but I would recommend the second one as it allows you to keep your gallery folder as a self-contained entity on your web server which might help to keep things organized.