How to restore tool docks to original setup

[sallyanne]

I have closed the tool options box before but got it back using the add dockable dialog. This time I can get it to open in it's own window, until I do something else which it then disappears. I have tried all these sugestions and it is still disappearing on me. Lock tab is on but it is not staying! I am unable to add the tab on my other dock (other side of window) either.
Was trying to do something I did once before but instead ended up with this headache. HELP! please