Just Installed Ubuntu, not recognized as operating system on startup

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http://askubuntu.com – I am new to Ubuntu and just decided to install it in (on my new lenovo thinkpad) in addition to my windows 7 operating system. Now, whenever I reboot the computer, it only runs window 7. I went (in windows) to Control Pannel -> System -> Advanced Settings -> Startup and Ubuntu is not even listed as a choice for operating system. I tried installing ubuntu again, but now it wants to partition the already partitioned windows folder. I can't figure out how to get ubunutu, which seems to be installed, to run. I saw on another question here that I could be able to edit my mrb settings using EasyBCD (HowTos)