I have a client that is using XP Pro on his desktop and is having a problem using an .ica file. The file works with four other remote users except this one user. He can install the ICA Client program without error, but every time he then clicks the .ica file to launch his Citrix session it just flashes on the screen but never connects or gives a specific error. The user with the same PC right next to him works just fine. Any thoughts? Thanks in advance.