[MonoDevelop] MonoDevelop project options

[Tamara Kustarova]

Hello,
I have a C# project in MonoDevelop. The problem is that when I change my
project options, click ok and close MonoDevelop, the next time when I
open the same project, it seems that the changed that I had made in my
project options weren't saved. I always to set the option "sign the
assembly on" and I choose the key file, that should be used. The next
time I open my project, the option sign the assembly on is off.
Am I doing something wrong?
Thank you for your help.
Tamara