search and replace

I have a .VBS file and I need to search it and find some text and then replace that something with new text.   

Here is what the .VBS script looks like.

 WINDOWS NETWORK PRINTER 1

sPrinter1 = "\\MGMG17PS\MGIS119Q"

WshNetwork.AddWindowsPrinterConnection sPrinter1

WshNetwork.SetDefaultPrinter sPrinter1

'

' WINDOWS NETWORK PRINTER 2

sPrinter2 =  "\\MGMG17PS\MGIS130Q"

WshNetwork.AddWindowsPrinterConnection sPrinter2

'

' WINDOWS NETWORK PRINTER 3

sPrinter3 =  "\\SERVER\QUEUE"

WshNetwork.AddWindowsPrinterConnection sPrinter3

Here is my code that does not work.

Get-Content "c:\temp\searchreplace.vbs" | Foreach-Object {$_ -replace "MGMG17PS!$", "MGH-PRINT01"} | Set-Content "c:\temp\searchreplace2.txt"

What am I missing?