Table split Overlap Page Header

Hi,
I'm new to reportlab world so may be this is easy question but i couldn't
find any useful information after digging the mailing list and Google

so my problem is when a table split automatically it overlap my page header
i managed this overlap in first page by adding Spacer
but i have no clue how to do it for the auto splited table pages

here is a demo of what i mean it appear  in page No:2


Test.py
=======
from io import BytesIO

from reportlab.lib import colors
from reportlab.platypus import SimpleDocTemplate,Table,TableStyle,Spacer
from reportlab.lib.pagesizes import A4,landscape
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

pdfmetrics.registerFont(TTFont("arial",'arial.ttf'))

PageWidth,PageHight=landscape(A4)
buffer=BytesIO()
PdfDoc=SimpleDocTemplate(buffer,pagesize=(PageWidth,PageHight),showBoundary=0,
    rightMargin=18,leftMargin=18,topMargin=18,bottomMargin=32)

PageHeader1="PageHeader1"
PageHeader2="PageHeader2"
(PageHeader1FontName,PageHeader1FontSize)=('arial',14)
(PageHeader2FontName,PageHeader2FontSize)=('arial',14)

TableHeaderColsName =["1","2","3","4","5","6","7","8","9"]
TableHeaderColsWidth=[40,40,40,40,40,40,40,25,40]

AllRows = []
for i in range(1,50):
    AllRows.append(["A","B","C","D","E","F","G","H","I"])

AllTableData=[TableHeaderColsName,]+AllRows

def myFirstPage(canvas,doc):
    canvas.saveState()

    canvas.setFont(PageHeader1FontName,PageHeader1FontSize)
    canvas.drawCentredString(PageWidth/2,PageHight-27,PageHeader1)

    canvas.setFont(PageHeader2FontName,PageHeader2FontSize)
    canvas.drawCentredString(PageWidth/2,PageHight-55,PageHeader2)

    #Some More Stuff

    canvas.restoreState()

def myLaterPages(canvas,doc):
    canvas.saveState()

    canvas.setFont(PageHeader1FontName,PageHeader1FontSize)
    canvas.drawCentredString(PageWidth/2,PageHight-27,PageHeader1)

    canvas.setFont(PageHeader2FontName,PageHeader2FontSize)
    canvas.drawCentredString(PageWidth/2,PageHight-55,PageHeader2)

    #Some Diffrent Stuff

    canvas.restoreState()

tblStyle=TableStyle([('TEXTCOLOR',(0,0),(-1,-1),colors.black),
   ('VALIGN',(0,0),(-1,-1),'MIDDLE'),
   ('ALIGNMENT',(0,0),(-1,-1),'CENTER'),
   ('LINEBELOW',(0,0),(-1,-1),1,colors.black),
   ('BOX',(0,0),(-1,-1),1,colors.black),
   ('INNERGRID',(0,0),(-1,-1),.5,colors.black),
   ('FONT',(0,0),(-1,-1),'arial',10),
   ('FONT',(0,0),(-1,0),'arial',10)
   ])
tblStyle.add('BACKGROUND',(0,0),(-1,0),colors.lightblue)


MyTable=Table(AllTableData,colWidths=TableHeaderColsWidth,
    rowHeights=[30,]+([15]*(len(AllTableData)-1)),
    repeatRows=1)
MyTable.hAlign = 'CENTER'

MyTable.setStyle(tblStyle)

Elements=[]
Elements.append(Spacer(0,54))
Elements.append(MyTable)

PdfDoc.build(Elements,onFirstPage=myFirstPage,onLaterPages=myLaterPages)

x=buffer.getvalue()
with open("doc0.pdf",'wb') as f:
    f.write(x)

print("End")


thanks in advance