Form Declaration in a class in AX2012

Hello to All,

                    I am getting an issue, I have to create a form with 2 Buttons(for example), then i have to write a code in class to Enable/Disable the button1 and have to keep this class in Button2 by calling the class in Button2'sclicked method, means to Enable/Disable the Button1 using Button2  but through a class.

                            But while declaring my Form in a class i am getting an error-->"Err:9999".

                                          SO how to solve this issue, how can i use my form in a class.

Thanks & Regards

Raj..