[ubuntu] Grub Rescue Help?

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http://ubuntuforums.org – Okay, so I split my HD into two partitions, my original windows 7 partition and an Ubuntu partition. I needed to delete my ubuntu partition briefly, but now when I try to boot my computer it comes up with "error no such partition grub rescue." I've tried booting from my Ubuntu CD to reinstall it, but it doesn't work. My ubuntu CD does work as I tried it on another laptop and it worked fine. Is it something wrong with my CD drive? I don't want to lose anything off my hard drive if possible, and want to reinstall Ubuntu. Any help would be appreciated. By the way, my laptop is an Acer A (Hardware)