Question : SSRS report Create a new data source for a parameter

I have a report which data source is a Stored Procedure. The report works fine. But I have several parameters that a user must provide the retrieve the data they want. How can I fill a drop down box with data from a different data source. For example say I want to list all the employees names from an employee table. I don't have that information from my stored procedure. I can't seem to add a new Dataset in the Report Datasets section. Any suggestions? can it be built in the expression part of the parameter? If so does someone have an example?
Thanks in advance

Answer : SSRS report Create a new data source for a parameter

you should be able to create a new dataset on the data tab, then either pick an existing data source or create a new one from there and put your query for the employee names there to use for your parameter.

SSRS2005CreateNewDataset.png (8 KB) (File Type Details) 

New Dataset on Data Tab

SSRS2005NewDatasetScreen.png (10 KB) (File Type Details) 

New Dataset Screen