Using a Variable to Substitute the path\filename of a Batch file in the Start_Process Command

I am trying to write a script that will execute a batch file on a remote Windows server.

This line below is basically what I'm trying to do and it works without error, however I would like to use a variable for the path\filename of the batch file.

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invoke-command -computername QSC-A-ICE01 -scriptblock {Start-Process "\\qsc-a-ice01\D$\Test\RunThis.bat" }

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If I try to use a variable as in this example below I receive the error below. The error seems to indicate it's it expecting a "FilePath" parameter. Is this true? How would I change this script to make it work when substituting a variable.

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$MyProcess =  "\\qsc-a-ice01\D$\Test\RunThis.bat"
Write-Host $MyProcess
invoke-command -computername QSC-A-ICE01 -scriptblock {Start-Process "$MyProcess"}

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This is the error text I receive when using a variable:

 PS C:\Windows\system32> D:\Test\ThisWorks.ps1
\\qsc-a-ice01\D$\Test\RunThis.bat
Cannot validate argument on parameter 'FilePath'. The argument is null or empty. Supply an argument that is not null or
empty and then try the command again.
    + CategoryInfo          : InvalidData: (:) [Start-Process], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.PowerShell.Commands.StartProcessCommand
    + PSComputerName        : QSC-A-ICE01

PS C:\Windows\system32>