Windows XP Skipping Over 7 During Boot

[MooMooCow]

I am no longer getting the OS selection screen when I boot, instead it's going directly into Windows XP. I had the choice until I went into XP, but without changing anything I no longer do. My Windows installations are on two partitions of the same drive, with XP being installed first and 7 second. I've already tried Window 7's startup repair utility. Would anyone know what I need to fix? Thanks in advance.