Invoke-command with scriptblock and double quotes

I'm having difficulties with some commands in scriptblocks. The last line in the scriptblock is generating errors which appear to be due to double quotes. Any help would be great!

The error:

At C:\temp\createcdnsite.ps1:23 char:261
+ ... My Website"}
+                    ~~
The string is missing the terminator: ".
At C:\temp\createcdnsite.ps1:23 char:40
+ Invoke-Command -ComputerName $computer {set-WebConfiguration â?"Filter /Syste
m.W ...
+                                        ~
Missing closing '}' in statement block.
At C:\temp\createcdnsite.ps1:22 char:37
+ Foreach ($computer in $computerlist){
+                                     ~
Missing closing '}' in statement block.
    + CategoryInfo          : ParserError: (:) [], ParseException
    + FullyQualifiedErrorId : TerminatorExpectedAtEndOfString

..here's the overall script

$sc = {
$pathtosite = "D:\website"
Add-WindowsFeature Web-Server,web-asp,web-basic-auth,web-windows-auth,web-mgmt-tools
Import-Module WebAdministration
New-Website -Name "My Website" –HostHeader "www.website.int" -PhysicalPath $pathtosite
set-WebConfiguration –Filter /System.WebServer/HttpErrors/Error[@StatusCode='404'] -Value @{PrefixLanguageFilePath="$Null"; Path="$pathtosite\FileNotFound.htm"} -PSPath IIS:\ -location "My Website"
}

$computerlist = Get-Content c:\temp\computerlist.txt
Foreach ($computer in $computerlist){
Invoke-Command -ComputerName $computer -ScriptBlock $sc
}