Can't open outlook 2007

[cravingmad]

Hi, I was given help last week concerning stuck read receipt messages and
going into the root folder. I'm sure I did what was asked but now I can't
open outlook it comes up with:

This error can occur if you attempt to run Outlook from a Terminal Server
session when the OST file is in use by the console session.

To access this instance of Outlook, exit the current Terminal Server
session, and then start a new session by using the following Run command in
Microsoft Windows:

mstsc.exe /CONSOLE

You must be an administrator on the computer that is accessing the console
session. You cannot access a console session from a computer running
Microsoft Windows XP Home edition. But you can do so from a computer running
Microsoft Windows Server 2003, Microsoft Windows XP Professional, or
Microsoft Windows Vista.

For more information, see Microsoft Knowledge Base article 826488.

Not 100% sure what i did or if I'm able to put it right, but when I look for
mstsc.exe /CONSOLE, it says it doesn't exist.

can anyone help, without it being too complicated.

Thank you,
Helen