Amazon Associates Resize Banner to Custom Size

I am trying to resize my Amazon Associates Easy Link widget.

Here is the code:

IFRAME
<iframe src=”https://rcm-na.amazon-adsystem.com/e/cm?t=give0fc-20&o=1&p=9&l=ez&f=ifr&f=ifr&linkID=GBT4GBOYPMVA6ZQC&#8221; width=”180″ height=”150″ scrolling=”no” marginwidth=”0″ marginheight=”0″ border=”0″ frameborder=”0″ style=”border:none;”></iframe>

JAVASCRIPT
<div class=”alignleft”>
<script type=’text/javascript’>
amzn_assoc_ad_type = ‘banner’;
amzn_assoc_tracking_id = ‘give0fc-20’;
amzn_assoc_marketplace = ‘amazon’;
amzn_assoc_region = ‘US’;
amzn_assoc_placement = ‘assoc_banner_placement_default’;
amzn_assoc_linkid = ‘EWEMJVTUVVD54EYX’;
amzn_assoc_p = ‘9’;
amzn_assoc_banner_type = ‘ez’;
amzn_assoc_width = ‘180’;
amzn_assoc_height = ‘150’;
</script>
<script src=’//z-na.amazon-adsystem.com/widgets/q?ServiceVersion=20070822&Operation=GetScript&ID=OneJS&WS=1′></script>
</div>

When I try to simply change the width and height in the code, it doesn’t budge on my actual website. Is there something special I have to do to modify Amazon’s code? I would like the widget to be much larger, something like 700w and 500h with the content inside larger to match the size of the widget.

Any suggestions are much appreciated!