something very annoying

[colore]

when I have some windows opened (all maximized) and I click the tab of the active window in the taskbar, winxp drops the window in the background but it doesnt activate any of the rest window, and it goes in a state where all windows are in the background (no one is activated) and at the same time all windows are maximized

this is so annoying, is it possible to fix it?

thanks