Opening office word 2003 with 2007

Hello,
I have a microsoft office word 2003 file but I have office 2007 installed and I cannot open this file. I am in some serious predicament since it is related to my project. Is there a way to transform or open this 2003 file with 2007. Since I cannot open it I cannot copy it either. Please some one give me some ides so that I can proceed with my project.
Wendell Montego
