AVL Trees

I'm trying to create a program for AVL trees that will insert integers into the tree then print the contents of the tree but I am getting errors. Here is my code:
This is TreeType.h
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#pragma once
#include "StdAfx.h"
struct TreeNode;

template <class ItemType>

class TreeType
{
public:
	TreeType(void);
	~TreeType(void);
	void InsertItem(ItemType item);
	void Insert (TreeNode<ItemType>*& tree, ItemType item, bool & taller);
	void RightBalance (TreeNode<ItemType> *& tree, bool & taller);
	void LeftBalance (TreeNode<ItemType> *& tree, bool & taller);
	void RotateLeft (TreeNode<ItemType> * & tree);
	void RotateRight (TreeNode<ItemType> * & tree);
	
//private:
	//TreeNode<ItemType>*& tree;

};

template <class ItemType>
void TreeType<ItemType>::InsertItem(ItemType item)
// Calls recursive function Insert to insert item into tree.
{
	bool taller;
	Insert (root, item, taller);
}

template <class ItemType>
void TreeType<ItemType>::Insert (TreeNode<ItemType>*& tree, ItemType item, bool & taller)
// Inserts item into tree.
// Post:	item is in tree; search property is maintained.
{
	if (tree == NULL)
	{					// Insertion place found.
		tree = new TreeNode<ItemType>;
		tree->left = NULL;
		tree->right = NULL;
		tree->info = item;
		tree->bf = EH;
		taller = true;
	}
	else if ( item == tree->info)
	{
	cerr << "Duplicate key is not allowed in AVL tree." << endl;
	}
	else if (item < tree->info)
	{
		Insert (tree->left, item, taller);   
		if (taller)
			switch (tree->bf)
			{
				case LH: LeftBalance (tree, taller); 
					break;
				case EH: 
					tree->bf = LH;
					break;
				case RH: 
					tree->bf = EH; 
					taller = false;
					break;
			}
	}
	else if (item > tree->info)
	{
		Insert (tree->right, item, taller);
		if (taller)
			switch (tree->bf)
			{
				case RH: 
					RightBalance (tree, taller); 
					break;
				case EH: 
					tree->bf = RH; 
					break;
				case LH: 
					tree->bf = EH; taller = false;
					break;
			}
	}


template <class ItemType>
void TreeType<ItemType>::RightBalance (TreeNode<ItemType> *& tree, bool & taller)
{
	TreeNode<ItemType> * rs = tree->right;
	TreeNode<ItemType> * ls;

	switch (rs->bf)
	{
	case RH:	tree->bf = rs->bf = EH;
			RotateLeft(tree);
			taller = false;
			break;
	case EH:	cerr << "Tree already balanced " << endl;
			break;
	case LH:	ls = rs->left;
			switch (ls->bf)
			{
			case RH:	
				tree->bf = LH;
				rs->bf = EH;		
				break;
			case EH:	
				tree->bf = rs->bf = EH;	
				break;
			case LH:	
				tree->bf = EH;
				rs->bf = RH;		
				break;
			}
			ls->bf = EH;
			RotateRight(tree->right);
			RotateLeft(tree);
			taller = false;
	}
}


template <class ItemType>
void TreeType<ItemType>::LeftBalance (TreeNode<ItemType> *& tree, bool & taller)
{
	TreeNode<ItemType> * ls = tree->left;
	TreeNode<ItemType> * rs;

	switch (ls->bf)
	{
	case LH:	
		tree->bf = ls->bf = EH;
		RotateRight(tree);
		taller = false;	
		break;
	case EH:	
		cerr << "Tree already balanced " << endl; 
		break;
	case RH:	
		rs = ls->left;
			switch (rs->bf)
			{
			case LH:	
				tree->bf = RH;
				ls->bf = EH;		
				break;
			case EH:	
				tree->bf = ls->bf = EH;	
				break;
			case RH:	
				tree->bf = EH;
				ls->bf = LH;		
				break;
			}
			rs->bf = EH;
			RotateLeft(tree->left);
			RotateRight(tree);
			taller = false;
	}
}

template <class ItemType>
void TreeType<ItemType>::RotateLeft (TreeNode<ItemType> * & tree)
{
	TreeNode<ItemType> * rs;

	if (tree == NULL)
		cerr 	<< "Cannot rotate an empty tree in RotateLeft" << endl;
	else if (tree->right == NULL)
		cerr << "Cannot make an empty subtree the root in RotateLeft" << endl;
	else 
	{
		rs = tree->right;
		tree->right = rs->left;
		rs->left = tree;
		tree = rs;
	}
}

template <class ItemType>
void TreeType<ItemType> :: RotateRight (TreeNode<ItemType> * & tree)
{
	TreeNode<ItemType> * ls;

	if (tree == NULL)
		cerr << "Cannot rotate an empty tree in RotateRight" << endl;
	else if (tree->left == NULL)
		cerr << "Cannot make an empty subtree the root in RotateRight" << endl;
	else 
	{
		ls = tree->left;
		tree->left = ls->right;
		ls->right = tree;
		tree = ls;
	}
}

}

and heres whats in main:
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#include "stdafx.h"
#include "TreeType.h"
using namespace std;

typedef int ItemType;

TreeType<int>tree;

int _tmain(int argc, _TCHAR* argv[])
{
	int option;
	do
	{
			system("CLS");
			cout << "\t1. Insert into an AVL Tree\n";
			cout << "\t2. Print the contents of the AVL tree\n";
			cout << "\t3. Exit\n";
			cout << "\t\tEnter option : ";
			cin >> option;
	
		switch (option)
		{
			case 1:
				//Insert
				cout << "test";
			
				break;
			case 2:
				//print

				break;
		}

	} while (option < 3);

	return 0;
}


when I include the line #include "TreeType.h" I get loads of errors in main.

Hope someone can help.
Thanks
Try separating the definitions of the templated members into their own file.
no I still get the same errors
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