AutoCAD Civil 3D

[#1]

I am working in a .dwg that i have previously created cogo point in, but now when i try to created cogo points manually, it goes through the prompts, but will not create the point. Any ideas as to what is wrong and how to fix it? P.S I am using Civil 3d 2011

[#2]

The Next Point Number is probably set to a used point#

[#3]

I copy clipped the drawing and pasted it in a new drawing and everything worked just fine. Thanks for the help though.