Windows 7 boot issues

I installed Windows 7 on my macbook pro four days ago. It installed no problem and ran well. My mac would even boot into it no problem after restarting. Then I try booting into Windows 7 today, and all I get is a black screen. It doesn't even have the blinking white currsor on it. I haven't done any system changes since installing windows. I also had windows 7 installed a year ago, but I removed it because of this same issue. I have an early 2011 13 inch macbook pro with 4gb of ram and 2.3GHz i5 processor. I've tried using rEFIT. It just ends up doing the same thing. I cant even get the windows disc to attempt to load.