Create chart in Visual Studio using multiple datasets

Hi,<o:p></o:p>

I am trying to create a chart in Visual Studio using the data i have displayed in a Tablix with 2 datasets.<o:p></o:p>

In the tablix, the userID field is returned via a dataset query. An additional query then looks up that userID and grabs the "successful calls" and divides this number by the "number of calls" minus the "calls unanswered" (this is done using the expression below)<o:p></o:p>

=(Lookup(Fields!fldUserID.Value,Fields!fldUserID.Value,Fields!Count.Value, "Booked"))/((Lookup(Fields!fldUserID.Value,Fields!fldUserID.Value,Fields!CallCount.Value,"TotalCalls"))-(Lookup(Fields!fldUserID.Value,Fields!fldUserID.Value,Fields!CallCount.Value, "NoAnswer")))<o:p></o:p>

Now this works OK and displays the values in the tablix, but when I try to create a chart with the same results I can't get very far...<o:p></o:p>

So what I need to return in the dataset to make a table (i think) is<o:p></o:p>

userID, ConversionRate<o:p></o:p>

(with the conversion rate being the calculation above - eg 60/(400-80) = 18.75%)<o:p></o:p>

PS: There are parameters for dates used in the query for the datasets (not sure if that makes any difference)<o:p></o:p>