cannot boot into windows after installing back track

I have two hards, hard #1 which there is a win7 on it and hard #2 which there is no os on it. I allocated an extra partition on #2 to install back track 5, ... until last step of installation, I selected advance and tell the installation to install bootloader on dev/sda1 windows7 bootloader. after reboot I can boot into my back track but I can't boot into win7 (It exists in the boot selection list). any1 can help me please. I have important information in some apps in my windows. any help appreciated

There might be a way to alt-boot your system. In Macs, you can press the alt-key at start-up to choose your partition to boot.
However, you have to find a way (fdisk might help [I am not such a Windows user]) or the Disk Usage Analyzer of BT5 could give you a hint.

If your Windows-System is still installed, I'd put some external drive on your BT5 and make a raw backup first.
Who knows, your Windows 7 might even be shot dead.

Boot your windows7 install disk and fix the bootloader.

or try supergrubfix - its an iso