I can't get parental controls to work

I have set up parental controls. I have set up activity reporting on the

users. All I get is the programs used. Web sites visited is blank and

so is the instant messenger log even though Microsoft messenger 8.1 has

be extensively used. There does not appear to be anything else to set

but it does not work. The time limiting works OK. I have the same

problem on two computers now. They are home computers not on a domain.

Theo