Bug when setting FolderBrowserDialog1.SelectedPath in code

[AbacusData]

Do you know why this happens?

If (strCampaignFol der <> "") Then
'Next line works fine when strCampaignFold er already has a value set by FolderBrowserDi alog1.SelectedP ath further below.
FolderBrowserDi alog1.SelectedP ath = strCampaignFold er
Else 'PROBLEM: Next line causes the external .NET code 'UnsafeNativeMe thods' to put the app to sleep when strCampaignFold er has no existing value!
FolderBrowserDi alog1.SelectedP ath = "L:\InternetMar keting\AdWordsC ampaigns\LiveCh at-Software"
End If
If FolderBrowserDi alog1.ShowDialo g() = DialogResult.OK Then
'Get Campaign folder
strCampaignFold er = FolderBrowserDi alog1.SelectedP ath
End If

Can you suggest a workaround, please?