Store Locator not working in IE

I've been hitting my head to try to figure out why my store locator doesn't work in any IE and after turning all the modules off, I turned this template off and voila, everything works. What would it be? If you run

www.selectbride.ca/index.php?option=com_...&view=map&Itemid=155

in any version of explorer, it won't show the map.

When I run f12 it gives me the following errors

SCRIPT5007: Unable to get value of the property 'firstChild': object is null or undefined
main.js, line 456 character 26
SCRIPT5007: Unable to get value of the property 'firstChild': object is null or undefined
main.js, line 456 character 26

When I use any standard Joomla template, no error.

Thanks in advance.

I tried reinstalling the template, so that didn't work. Just to let you know I did the hot install option so it looked like the demo.
www.selectbride.ca/index.php produces

SCRIPT438: Object doesn't support property or method 'set'
mootools.js, line 23 character 10
SCRIPT438: Object doesn't support property or method 'set'
mootools.js, line 23 character 10

If you have problems with component com_storelocator you should ask the component's developers for help.

I've sent him a support request also. My question is why would this interfere with your template only in IE? Is it the way it's calling a loading event or something?

Ok, the only conclusion I could come up with is a IE CSS issue. If you get a chance, look at this link.
demo.sysgenmedia.com/index.php?option=co...tegory_3=0&Itemid=53

If you right click, view source, it's making an IE call to a CSS file to make it compatible. Keep in mind the template that is being used. How can we adapt this to your template? I would hate to look for another template after paying good money for this one.

His map works in IE, mine doesn't with your template so I need a resolution please.

I would rather say that that is script issue:

SCRIPT438: Object doesn't support property or method 'set'
mootools.js, line 23 character 10
SCRIPT438: Object doesn't support property or method 'set'
mootools.js, line 23 character 10

Maybe you have two references to mootools.js, and wrong one wins