wxpython image covering

[chrisvj11]

I have 2 images, one is supposed to be on top of the other. This works fine until one of the "movement" keys are hit (a,s,d,w)

import sqlite3 as sqlite
import wx
username=None
class MainWindow():
    def drawmap(self):
        self.map4_31="C:/python27/game/4_31.gif"
        self.map1=wx.Image(self.map4_31,wx.BITMAP_TYPE_GIF).ConvertToBitmap()
        height=self.map1.GetHeight()
        width=self.map1.GetWidth()
        self.map1.map4_31 = wx.StaticBitmap(frame, -1, self.map1, (270, 170), (width,height))
    def char(self,username):
        con=sqlite.connect('Characters.sqlite')
        cur=con.cursor()
        sql="""SELECT locationx,locationy FROM Characters WHERE name=%s""" % \
             (username)
        cur.execute(sql)
        data=cur.fetchall()
        positionx=str(data[0][0]).replace(" ","")
        positiony=str(data[0][1]).replace(" ","")
        positionx=int(positionx)
        positiony=int(positiony)
        self.playerFile = "C:/python27/game/player_tile.gif"
        self.playerbmp = wx.Image(self.playerFile,wx.BITMAP_TYPE_GIF).ConvertToBitmap()
        height=self.playerbmp.GetHeight()
        width=self.playerbmp.GetWidth()
        self.playerbmp.playerbitmap = wx.StaticBitmap(frame, -1, self.playerbmp, (positionx,positiony), (width,height))
    def OnKeyPress(self,event):
        keycode=event.GetKeyCode()
        con=sqlite.connect('Characters.sqlite')
        cur=con.cursor()
        sql="SELECT locationx,locationy FROM Characters WHERE name=%s""" % \
                (username)
        cur.execute(sql)
        data=cur.fetchall()
        locationx=data[0][0]
        locationy=data[0][1]
        if keycode==87:
            locationy=locationy-10
            sql="UPDATE Characters SET locationy=%s WHERE name=%s""" % \
                 (locationy,username)
            cur.execute(sql)
            con.commit()
            con.close()
            for char in frame.GetChildren():
                char.Destroy()
            self.drawmap()
            self.char(username)
        if keycode==83:
            locationy=locationy+10
            sql="UPDATE Characters SET locationy=%s WHERE name=%s""" % \
                 (locationy,username)
            cur.execute(sql)
            con.commit()
            con.close()
            for child in frame.GetChildren():
                child.Destroy()
            self.drawmap()
            self.char(username)
        if keycode==68:
            locationx=locationx+10
            sql="UPDATE Characters SET locationx=%s WHERE name=%s""" % \
                 (locationx,username)
            cur.execute(sql)
            con.commit()
            con.close()
            for child in frame.GetChildren():
                child.Destroy()
            self.drawmap()
            self.char(username)
        if keycode==65:
            locationx=locationx-10
            sql="UPDATE Characters SET locationx=%s WHERE name=%s""" % \
                 (locationx,username)
            cur.execute(sql)
            con.commit()
            con.close()
            for child in frame.GetChildren():
                child.Destroy()
            self.drawmap()
            self.char(username)
class loginWindow(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,None,-1,size = (600, 400))
        self.Center()
    def user(self):
        global username
        con=sqlite.connect('Characters.sqlite')
        cur=con.cursor()
        name=wx.TextEntryDialog(None, "Username", "Username")
        if name.ShowModal()==wx.ID_OK:
            username=name.GetValue()
            username="'" + username + "'"
            sql="""SELECT * FROM Characters WHERE name=%s""" % \
                 (username)
            cur.execute(sql)
            data=cur.fetchall()
            if len(data)==0:
                print "incorrect username"
            else:
                return username
        con.close()
    def password(self,username):
        password=wx.TextEntryDialog(None, "Password", "Password")
        if password.ShowModal()==wx.ID_OK:
            password=password.GetValue()
            con=sqlite.connect('Characters.sqlite')
            cur=con.cursor()
            sql="""SELECT * FROM Characters WHERE name=%s""" % \
                 (username)
            cur.execute(sql)
            data=cur.fetchall()
            if password!=data[0][2]:
                print "incorrect password"
            else:
                return password
while True:
    app=wx.PySimpleApp()
    if username==None:
        username = loginWindow().user()
    password=loginWindow().password(username)
    frame=wx.Frame(None,-1,'game',size = (600, 600))
    MainWindow().drawmap()
    MainWindow().char(username)
    frame.Bind(wx.EVT_KEY_DOWN, MainWindow().OnKeyPress)
    frame.Show()
    frame.Center()
    app.MainLoop()