grub not showing ubuntu even after boot repair

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http://askubuntu.com – I had installed windows 7 and ubuntu 12.04 side by side using dual boot. Recently I reinstalled my windows and the grub menu disappeared .I ran a boot repair from my ubuntu live cd to reinstall grub but it is still not showing ubuntu but only windows in grub http://paste.ubuntu.com/1059475 (HowTos)