>Hi,
>
>I've set up a BO like this:
>
>

// from my PolicyFee BO
>protected override void HookConstructor()
>{
>	// Place code here to be executed when the business object instantiates
>            this.AutoSaveOnParentSaved = true;
>            this.AutoCancelOnParentCancel = true;
>            this.AutoDeleteOnParentDeleted = true;
>            this.AutoEmptyOnParentAdded = true;
>            this.ForeignParentKeyField = "PlanFK";
>}

>
>Then I use it in a web page like this:
>
>

// from the RegisterBusinessObjects method
>            this.oPlan = (Plan)this.RegisterPrimaryBizObj(new Plan());
>
>            this.oPolicyFee = (PolicyFee)this.RegisterBizObj(new PolicyFee());
>            this.oPlan.RegisterChildBizObj(this.oPolicyFee);

>
>When displaying data, the page shows the correct value from this BO, but if I change the value and save, the changed value does not get saved. Is there something silly that I have missed out to force this to save?

I assume you are saying the child value changes are not being saved. How are you saving? Are you calling the form's save method? By setting those properties on the Child biz obj and registering it as a child, it should save when you save the parent.
Tim