Wait until you see the "Error..." Message on the Applet canvas. ;)
Open your ANSI file with a text editor and copy the the text in the textbox on this page. NOTE: Works only with texteditors which didn't kill the control characters (plain text
editor). If you run windows, the standard editor (Windows/Notpad.exe) can be used.
Press the paint button and wait a moment.
The applet should start to display your ANSI now.
(only standard ESCSequences are supported)