Unable to add entry



I installed Vista after Windows 7 on adjacent partitions, but lost the option to boot into the latter operating system. It would just go into Vista automatically. I then installed EasyBCD on Vista but it only detected the Vista and not the Windows 7. There was no option to add the other Windows os. How can I get the Win7 boot option back? I tried the Win7 dvd but no repair option came up. Thanks in advance for any assistance.
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