Powershell Script Quest One Snap-in Slow When Not Logged Into Domain

I have a powershell script that uses the Quest One ActiveRoles Management Shell for Active Directory snap-in.  

Scenario 1

When I'm in the office, the script runs very quickly (1 min).  No errors.

Scenario 2

When I take my laptop home, and log into the laptop using the same account (although I'm not connected to the domain), the script takes 20 minutes to complete.  No errors.

I have Internet access both at work and at home.

Script Code:

Function TestImport($a)
{
    Get-Date
    Write-Host "Importing CRL"
    $Q_CRL = Import-QADCertificateRevocationList -FileName $a
    Write-Host "Import Complete"
    $CRL_ThisUpdate = $Q_CRL.EffectiveDate
    $CRL_NextPublish = $Q_CRL.NextPublish
    $CRL_NextUpdate = $Q_CRL.NextUpdate
    Write-Host "CRL Effective Date/Time: $CRL_ThisUpdate"
    Write-Host "CRL Next Publish Date/Time: $CRL_NextPublish"
    Write-Host "CRL Next UPdate Date/Time: $CRL_NextUpdate"
    Get-Date
}

TestImport "C:\TEMP\My.CRL"

The slowness occurs when the script starts the import using the snap-in.

Get-PSSnapin returns the following:

Name        : Microsoft.PowerShell.Core
PSVersion   : 3.0
Description : This Windows PowerShell snap-in contains cmdlets used to manage components of Windows PowerShell.

Name        : Quest.ActiveRoles.ADManagement
PSVersion   : 1.0
Description : This Windows PowerShell snap-in contains cmdlets to manage Active Directory and Quest One ActiveRoles.

Get-ExecutionPolicy shows: RemoteSigned

Does anyone have any ideas as to why the snap-in would be running so slowly?  All the other parts of the script seem to run just fine; no slowness.  Any help would be greatly appreciated.

-m