Running PowerShell Script From Sent To Menu Not Working

I have a PowerShell script that adds a prefix to my files based on a given range but when I try to run it using the Sent To context menu I get the following error “You must provide a value expression on the right-hand side of the ‘%’ operator. At line:1 char:22” Any ideas on how to correct this? I am using PowerShell 2.0 and I have very little knowledge of scripting. I had some help with the code. I used this link to setup the Sent To: http://tomtalks.uk/2014/04/powershell-script-right-click-send-to-copy-ps1-to-txt/

[CMDLETBINDING()] PARAM( [Parameter(Mandatory=$true)] $Path ) $Directory = "$Pathtest.txt" $regex_LO = "^[0-1][0-6][0-5][0-9][0-9][0-9][0-9][0-9]" $regex_HI = "^[1-9][6][6-9][0-9][0-9][0-9][0-9][0-9]|^[1-9][7-9][0-9][0-9][0-9][0-9][0-9][0-9]" Get-ChildItem -Path $Path | %{ if($_.name -notmatch '^LO|^HI'){ if($_.name -match $regex_LO){ $newname = "LO" + $Matches.Values Move-Item -Path $_.FullName -Destination ($_.FullName -replace $Matches.Values,$newname) } elseif($_.name -match $regex_HI){ $newname = "HI" + $Matches.Values Move-Item -Path $_.FullName -Destination ($_.FullName -replace $Matches.Values,$newname) } } elseif($_.name -match '^HI'){ if(($_.name -replace '^HI') -match $regex_LO){ $newname = $_.name -replace '^HI','LO' $destination = $_.FullName -replace $_.name, $newname Move-Item -Path $_.FullName -Destination $destination } } elseif($_.name -match '^LO'){ if(($_.name -replace '^LO') -match $regex_HI){ $newname = $_.name -replace '^LO','HI' $destination = $_.FullName -replace $_.name, $newname Move-Item -Path $_.FullName -Destination $destination } } } 

Thanks in advance.