Registry editing error !!!

when I type regedit in run the msg comes 'registry editing has been disabled by the administrator.'

wht shall i do know ???

Start->Run->type 'gpedit.msc' widout da quotes n hit enter. Now in da left pane. expand User Config->Admin Templates->System.
Now look for 'Prevent Access to registry editing tools' in da ryt pane. Dbl-clk it n set it to 'Disabled'.