Problem with model class

[eluser]Lacsap[/eluser]
Hello

I'm working now with Codeigniter and i must say it saves a lot of time
But my problem now costs me a lot of time.


First:
I dont have this problem on localhost!
If i upload this site to my webhoster im getting this error!

And i wanna ask. Is it important to pay attention on writing:

Code:

$this->my_model->function(); 

with my_model or My_model?

If i call this model with a lower case first letter i'm getting error on localhost and on my webhost. But only with this model! I call all other models with lower case first letter!
With a upper case first latter i dont get any errors on localhost but on my webhost.

Error on webhost:

Fatal error: Call to undefined method My_model::get() in .../system/application/controllers/mycontroller.php on line 29

on line 29:

Code:

$data['vars'] = $this->My_model->get(); 

the function is:

Code:

return $this->db->query($sql)->result(); 

Ive got PHP Version 5.2.11 on webhost.
And PHP Version 5.3.0 on localhost.

I hope that are enough imformations to solve my problem :-(

THANKS !