Bootcamp not starting, BOOTMGR missing

Hello all, hope you're having happy holidays. Anyways, I foolishly attempted to increase the size of my bootcamp partition using Disk Utility and failed, only creating a second partition for my Macintosh HD. I deleted the second partition and attempted to re-allocate the space to the original Macintosh HD, but not only am I not able to do that but I can't boot back into Windows via Bootcamp. When holding the option key while starting I only get the options "Macintosh HD" and "Recovery". I do get the option to select Windows 7 as the startup disk under System Preferences, but while starting I get the error message "BOOTMGR Missing, Press any key to restart" and I my keyboard doesn't respond so I have to hold power to restart into OSX. I've seen other users with this issue so I was hoping maybe someone could provide me with some help on this. I have a Mid-2009 13-inch MacBook Pro, with a 2.53ghz Intel Core 2 Duo, running OSX 10.9.5. Thank you for any help in advance.