Loss of popup "gui" after upgrading ti Powershell v3.0

Hi there

I've just upgrade my power

shell to v3.0 and when I ran a script that uses parameters, I no longer get the popup box which displays the name of variable, with an input box and the helpmessage underneath.  Now all I get is the code running in the command window, and if I want to view the HelpMessage I have to type !?

Where's it gone?

Regards

Ian

PS Example code snippet below

Param (

[Parameter(Position=0,Mandatory=$True,HelpMessage="Please enter foldername in proper format")]

[ValidateNotNullOrEmpty()]

[string]$name)