Visual Basic 6 Business Objects

I have been following the tutorial offered byRockford Lhotka regarding the subject "Visual Basic 6 Business Objects" in VB-World Tutorials.

After doing all with respect to his codes, I come across the following statement:

"These buttons will only be enabled when there are exactly 11 characters in the SSN field."

But When I started running the codes, testing the program, the said buttons are not enabled.

Please may u help me on this Subject as I have become so interested.