Using multiple jQuery versions problem

I am building control that uses last version of jstree. Problem is that whole system is build using jQuery 1.3.2开发者_JAVA技巧, but i need to use jQuery 1.4.2 for jstree, also to prevent errors need "$" still pointing to jQuery 1.3.2 to make system works normally. I tried to solve problem like this

var jq142 = jQuery.noConflict(true);

And it works, but when i added other control to form like "datepicker" that initialized via $("#id").datepicker it throws error $("#id").datepicker is not a function

When i inspect DOM variables through firebug all is ok - $ is pointing to 1.3.2 and datepicker function is registered.

What it can be?

Thanks

in case anyone came to this by looking for unanswered questions, the answer was to simply upgrade to 1.4.*

btw: jQuery 1.7 has just been released... time to upgrade again ;-)