Strange problem with include file

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VS2008

C++

Visual-Studio

Hello!
I am working on a project in Visual Studio 2008. It has over 50 classes divided in folders and subfolders. Everything compiled nicely except two lines:

RandomTimedFlowElement.cpp
d:\c++_projects\projekat2010\pr2010\projekat_2010_1.0\concepts\abstract concepts\randomtimedflowelement.cpp(22) : error C2653: 'Event' : is not a class or namespace name
d:\c++_projects\projekat2010\pr2010\projekat_2010_1.0\concepts\abstract concepts\randomtimedflowelement.cpp(22) : error C3861: 'create': identifier not found

Event class is in Event.h and create() is static function in Event class.
This is strange because I included this class regularly and this cpp file doesn't see it. They are not in the same folder but when they are everything is OK.
So what should I do because I can't move .h file? It is needed in some other class also. I set include paths but the problem remains.
Why compiler doesn't just say: Event.h cannot open such file or directory ... but gives me these errors.
Please help.
This is the RandomTimedFlowElement.cpp:

// Class RandomTimedFlowElement 


#include "RandomTimedFlowElement.h"
// Event
#include "Event.h"

RandomTimedFlowElement::~RandomTimedFlowElement ()
{

}

// Other Operations (implementation)
void RandomTimedFlowElement::raiseEvent (ID id)
{
	Time tm = 0;
	tm = getTime(id);
	Event::create(this,tm,id);
}