Thread: type redefinition?

I haven't working on this program in forever, and I compiled it a week ago without any problems.

I opened it today, no changes have been made, and it's giving these errors:

c:\Documents and Settings\Administrator.NABEEL\My Documents\Visual Studio Projects\C++\RELEASE\L!quidBot\AIDLL\cAIBrain.h(15 ): error C2011: 'cAIBrain' : 'class' type redefinition
c:\Documents and Settings\Administrator.NABEEL\My Documents\Visual Studio Projects\C++\RELEASE\L!quidBot\AIDLL\cAIBrain.h(6) : error C2011: 'BLOCK' : 'struct' type redefinition

The code is:

Code:

struct BLOCK {
	vector <string> say;
	vector <string> resp;
	bool nopunc;
	int index;
	BLOCK *next;
};


class cAIBrain {
...
};