ProgrammaticLexicalScope ending problem.

using System;
using System.Collections.Generic;
using System.Text;
using ActiproSoftware.SyntaxEditor.Addons.CSharp;
using ActiproSoftware.SyntaxEditor;
using ActiproSoftware.SyntaxEditor.Addons.Dynamic;
using System.Collections;
using System.Drawing;

namespace TestApplication
{
    public class MyCSharp : CSharpSyntaxLanguage
    {

        public ILexicalState GwTemplateState
        {
            get
            {
                return LexicalStates["TplState"];
            }
        }

        public MyCSharp()
        {
            IsUpdating = true;

            HighlightingStyles.Add(new HighlightingStyle("TplDirectiveDelimiterStyle", null, Color.Black, Color.Yellow));

            // Create a new lexical state
            int number = LexicalStates.Count + 1 ;

            DefaultLexicalState tplState = new DefaultLexicalState(number, "TplState");
            tplState.DefaultHighlightingStyle = HighlightingStyles["TplDirectiveDelimiterStyle"];
            tplState.LexicalScopes.Add(new ProgrammaticLexicalScope( IsTemplateScopeStarted , IsTemplateScopeEnded));
            LexicalStates.Add(tplState);

            DefaultLexicalState.ChildLexicalStates.Add(tplState);

            IsUpdating = false;
        }

        public MatchType IsTemplateScopeStarted(ITextBufferReader reader, ILexicalScope lexicalScope, ref ITokenLexicalParseData lexicalParseData)
        {
            // If the character is a letter or digit...
            if (reader.Peek() == '<')
            {
                reader.Read();
                if (reader.Peek() == '%')
                {
                    reader.Read();
                    //lexicalParseData = new GwTemplateStartToken(this, GwTemplateState);
                    lexicalParseData = new LexicalScopeAndIDTokenLexicalParseData(lexicalScope, 201);
                    return MatchType.ExactMatch;
                }
                reader.ReadReverse();
            }
            return MatchType.NoMatch;
        }

        public MatchType IsTemplateScopeEnded(ITextBufferReader reader, ILexicalScope lexicalScope, ref ITokenLexicalParseData lexicalParseData)
        {
            // If the character is a letter or digit...
            if (reader.Read() == '%')
            {
                if (reader.Read() == '>')
                {
                    //lexicalParseData = new LexicalStateAndIDTokenLexicalParseData(DefaultLexicalState, byte.Parse("0"));
                    lexicalParseData = new GwTemplateEndToken(this, DefaultLexicalState);
                    return MatchType.ExactMatch;
                }
                else
                {
                    reader.ReadReverse();
                    reader.ReadReverse();
                    return MatchType.NoMatch;
                }
            }
            else
            {
                reader.ReadReverse();
                return MatchType.NoMatch;
            }
        }

    }
}