Can't boot Windows 7 after installling 12.04 on HP 6735s laptop

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http://askubuntu.com – I installed 12.04 through a USB drive and when it's done I can't load Windows 7 (Loader)(on/dev/sda1) in GRUB. When I select that, it displays a black screen and then returns to GRUB but I'm still able to boot into 12.04. Help me to solve this, I installed boot-repair, I checked and reinstalled Grub in the main option tab and checked place boot flag on sda1 Windows7 in other options tab , rebooted and it wasn't working. This is the boot info summary: http://paste.ubuntu.com/1206875/. I also tried sudo grub-install "(hd0)" sudo update-grub in the terminal and it gave me found Windows 7 (HowTos)