Models in PHP4

[eluser]nirbhab[/eluser]
See MVC is different thing here, but when we are talking about concepts, It should work,in fact....it is running fine on php5, i have tried every possible, things i could. Controller, Views....
But it is not working....any buddy has tried running models in php 4.4.8, Apache 1.3 and mysql 4.
Guys My CI Libraries are doing great, and has solved my problem to all extends, but why my models are not working? i am not getting this.