Problem with IE and JQuery

Hi guys, we have encountered some troubles with IE8 and IE9... When we try to display a track, we get an error and the component stops working . We are using joomla 1.5.22 and the latest version of CoreJoomla... This is the messagge:


Webpage e
C:fakepatherror.png
rror details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; .NET4.0C; .NET4.0E; Zune 4.7)
Timestamp: Thu, 30 Dec 2010 14:01:18 UTC


Message: 'jQuery' is undefined
Line: 19
Char: 1
Code: 0
URI: http://www.***.com/bikebook/components/com_gpstools/templates/default/scripts/gpstools.js


Message: Object doesn't support this property or method
Line: 8
Char: 186
Code: 0
URI: http://www.***.com/bikebook/media/system/js/mootools.js


Message: Object doesn't support this property or method
Line: 59
Char: 102
Code: 0
URI: http://www.***.com/bikebook/media/system/js/mootools.js