You want to display the Euro (€) symbol.
Download a Euro-enabled font from Microsoft. Double check that you can see the Euro symbol by opening Notepad on the machine where you installed the font and entering the ASCII code for the Euro symbol. As long as you see the symbol in notepad, you should be able to see it within Silk Test Classic.
In Silk Test Classic, click and be sure that your font is set to Arial, Courier New, or Times New Roman.