# WinEdt can not recognize MiKTeX after setting the root [closed]

I tried to update MiKTeX from version 2.8 to version 2.9. Then I installed the version 2.9 in `C:/program files/Miktex 2.9` and then configure the MiKTeX in WinEdt by ＂`Tex->Miktex-> Miktex options->roots`". However, after restarting the WinEdt, the MiKTeX can not use, the buttons of the MiKTeX are disabled. Can someone help me?

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## closed as too localized by egreg, Speravir, Gonzalo Medina, percusse, David CarlisleApr 6 '13 at 22:57

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The menu you mention leads to miktex options (and I have no idea what you did there) and has nothing to do with configuring winedt (which normally isn't necessary at all). Check in `options->execution modes` the diagnosis, path and texsystem-Tab. – Ulrike Fischer Feb 16 '13 at 9:43
@UlrikeFischer thanks, sorry, which "options" tab do you mean? – sweetyBaby Feb 16 '13 at 10:13
I would suggest that you simply check all options menu of all perhaps relevant applications for a submenu `execution modes`. I don't think that is asking to much of you. – Ulrike Fischer Feb 16 '13 at 11:46
@UlrikeFischer yes, I have checked it and set "Tex root" to the Miktex path under "tex" tab, however, when I choose the auto detect , the Tex root changes. But If I don't choose the auto detect button, the buttons still are disabled. – sweetyBaby Feb 16 '13 at 12:08
I’m quite sure, that this is related to your older question How to update MiKTeX 2.8 to 2.9 in WinEdt?. – Speravir Feb 16 '13 at 22:31