[SOLVED] 404 Page Not Found on Default controller

[eluser]Webjema[/eluser]
Hello.
Please, help me =(
Strange error happened.
Log:

Code:

DEBUG - 2011-06-23 00:11:17 --> Config Class Initialized
DEBUG - 2011-06-23 00:11:17 --> Hooks Class Initialized
DEBUG - 2011-06-23 00:11:17 --> Utf8 Class Initialized
DEBUG - 2011-06-23 00:11:17 --> UTF-8 Support Enabled
DEBUG - 2011-06-23 00:11:17 --> URI Class Initialized
DEBUG - 2011-06-23 00:11:17 --> Router Class Initialized
DEBUG - 2011-06-23 00:11:17 --> No URI present. Default controller set.
DEBUG - 2011-06-23 00:11:17 --> Output Class Initialized
DEBUG - 2011-06-23 00:11:17 --> Security Class Initialized
DEBUG - 2011-06-23 00:11:17 --> Input Class Initialized
DEBUG - 2011-06-23 00:11:17 --> XSS Filtering completed
DEBUG - 2011-06-23 00:11:17 --> XSS Filtering completed
DEBUG - 2011-06-23 00:11:17 --> XSS Filtering completed
DEBUG - 2011-06-23 00:11:17 --> CRSF cookie Set
DEBUG - 2011-06-23 00:11:17 --> Global POST and COOKIE data sanitized
DEBUG - 2011-06-23 00:11:17 --> Language Class Initialized
DEBUG - 2011-06-23 00:11:18 --> Config Class Initialized
DEBUG - 2011-06-23 00:11:18 --> Hooks Class Initialized
DEBUG - 2011-06-23 00:11:18 --> Utf8 Class Initialized
DEBUG - 2011-06-23 00:11:18 --> UTF-8 Support Enabled
DEBUG - 2011-06-23 00:11:18 --> URI Class Initialized
DEBUG - 2011-06-23 00:11:18 --> Router Class Initialized
ERROR - 2011-06-23 00:11:18 --> 404 Page Not Found -->

All work fine. I do not touch router or default contoller.
But root url stoped work. No output to browser.
Why? "No URI present. Default controller set." and "404 Page Not Found"???

[eluser]Webjema[/eluser]
Hm...
Debug... Debug... Debug.
Some error (I do not know) was in default controller (php file).
But PHP say nothing.