Hello Avers,
Have a look at this thread here:
http://www.subsim.com/radioroom/show...+patrol+orders
I had the same problem once and had to do a complete uninstall and then a fresh re-install.
Just to ensure that I have no garbage left from the old install, I do a complete search of all hidden folders in Windows 7 and delete all the relevant files / folders that get left behind.
I also clear out all SH3, Ubisoft and SH3 Commander references from the Registry and then re-boot the computer before re-installing.
Watch what you are doing with this one if you are not confident with amending the Registry.

Two important points.
1. Back the registry up before amending.
2. Leave it alone if you have any doubts about what you are doing.
Good luck