Remote Desktop/Terminal Services forgets User Name on Vista

Hi All

On XP and 2000 the RDP file stored the user name and password for the TS link.
On Vista this apperas to be held somewere else and whats more it stores it for the link to that machine.
The Problem I am encountering is I have different user/passwords for different tasks on the server.
Ie links to apps, links to admin, links to user accounts. Vista refuses to remember any but the last one saved.

Anyone know a way round this?