Event object is null when event is fired. WebUserControl ASP.NET/AJAX

[Matt Michler]

I have a WebUserControl with a custom event, when this event is fired,
the delegate or event object is throwing a null reference exception.
The odd part of this is, it used to work flawlessly, now it never
works. I'm not sure what change affected the event while my coworker
and I were working on this control.

Here's the event code in the control from which the event is spawned:
<code>
public Guid DbReferenceID {
get {
if (ViewState["contactID"] != null) {
return (Guid)ViewState["contactID"];
} else {
return new Guid();
}
}
set {
ViewState.Add(" contactID", value);
SetID(value);
}
}

public delegate void DoctorAction(Gu id doctorID, DoctorActions
action);
public event DoctorAction OnDoctorAction;
public enum DoctorActions {
Add,
Edit,
Delete,
Select
}

protected void Doctor_Click(ob ject sender, CommandEventArg s e) {
// This if statement is only for testing. Currently, OnDoctorAction is
always null
if(OnDoctorActi on == null) {
System.Windows. Forms.MessageBo x.Show("Nobody is listening to
this event!");
}else {
OnDoctorAction( DbReferenceID, DoctorActions.A dd);
}
}
</code>

This is the code that responds to the action in the control's parent
control:
<code>
protected void Page_Load(objec t sender, EventArgs e) {
DoctorSearchUse rDoctor.OnDocto rAction += new
User_Controls_D octorSearchCard .DoctorAction(D octorSearchUser Doctor_OnDoctor Action);
}

void DoctorSearchUse rDoctor_OnDocto rAction(Guid doctorID,
User_Controls_D octorContactPop Up.DoctorAction s action) {
// Event never gets this far.
AIMDoctorsTable Adapters.Doctor sTableAdapter drTableAdapter = new
AIMDoctorsTable Adapters.Doctor sTableAdapter() ;
switch (action) {
case (User_Controls_ DoctorContactPo pUp.DoctorActio ns.Add):
drTableAdapter. SetUserID(UserI D, doctorID);
SetDoctor();
break;
}
}
</code>

We've been trying to find a solution to this problem for two days now,
but we are stumped. Any ideas? If anymore information is needed, of
course, let me know and I'll do my best to supply it.