why wont "&xml_file=myXml.xml" work?

[gordee]

Hi,

here is my code;

<spot id="043-016" alt="016/Mill 3"
url="icons/arrowDown.png"
pan="75" tilt="0" linked="images/043"
onClick="pano.leash=free; loadPano(panoName=images/016&xml_file=The Tour/Mill_3.xml);" />

It is essential for my tour because it contains 110 panos so I need to do it in sections!

I have double checked the filenames/directories etc so i am a bit stuck