Script to check whether text has been added to text file

I am using the following script to check whether a string being 'hello' was added to the following textfile.

But at line 16  being If LastCount = -1 Then , i get an error, see attachment


MyString = "hello"
MyTextFile = "C:\Documents and Settings\admhomaa\Desktop\test.txt"

Set objFSO = CreateObject("Scripting.FileSystemObject")

Set myRegExp = new regexp  
myRegExp.IgnoreCase = True
myRegExp.Global = True
myRegExp.Pattern = MyString
LastCount = -1
NeverEnds = 0
Do Until NeverEnds = 1
        Set objFile = objFSO.OpenTextFile(MyTextFile, 1)
        X = objFile.Readall
        Set myMatches = myRegExp.Execute(X)
        If LastCount = -1 Then
                Set LastCount = myMatches
        Else
                If myMatches.count > LastCount Then
                MsgBox "Yes"
                LastCount = myMatches
                        WScript.Quit
                End If
        End If
        objFile.Close
        WScript.Sleep 5000 ' sleep for 5 seconds
Loop