another 404 page not found error

[eluser]E.D. Leutscher[/eluser]
Hi guys,

I have a problem with my codeigniter application.
Everything works on my home server with MAMP but when i upload it i get the '404 page not found' codeigniter error.

Which doesn't make sense because of the fact that all my settings are right.

When i look to my log files i see this error:

DEBUG - 22-12-2009 17:07:55 --> Config Class Initialized
DEBUG - 22-12-2009 17:07:55 --> Hooks Class Initialized
DEBUG - 22-12-2009 17:07:55 --> URI Class Initialized
ERROR - 22-12-2009 17:07:55 --> 404 Page Not Found --> portal

I've found another user with a similar problem (http://ellislab.com/forums/viewthread/44894/) on this forum and I used his solution but it turned out it wasn't the solution for my problem because of the fact that he doesn't go further than loading the URI Class, so something is going wrong right there.. The problem is i don't know what it is.

My application is running in the follwoing dir:
http://my.domain.name/cms/

so that means that the system folders are here:
http://my.domain.name/cms/system/
etc.etc..

Is there someone who knows what it is, or can someone get me in the right way?

Thanks in advance