Scrambling problem

Hello, I am new to TDMS. The basis team implemented TDMS 4, and now it's time for the abap (me) create the crambling rules.

I have read the how-to document, and tried to follow some tutorials, but I encounter this problem every time:

     -  In the first screenshot you can see that some of the standard rules have the red status;

     - One of the rules I want to create, is to scramble the first name of the employee, but like you can see in the second screenshot, the rule has errors,            wich are strange, the tables are not defined in the ABAP Dictionary.

Can anyone help me please? Would be most thankful!