I've always been interested in Uplink, so I bought it earlier this week. But now I'm stuck on one of the missions that has been appearing since I reached the "Confident" rank: it's asking me to prove that an employee is over-qualified by changing his academic record. Specifically: "We feel that this employee scored slightly too highly at his degree. Give him a 3rd class replacement."
I break into the academic database, look up the employee, and find that he has three classes, so I change the grade letter on the third class from a D to an F, commit, and disconnect. But when I reply to the mission request asking for money, they tell me that I haven't changed anything yet.
Is there something I'm misunderstanding here? How does one fulfill the goal of this mission?