Using A Dynamically Created Parameter In Another Dataset Query

It's been a while since I used Reporting Services so I'm sure this is really straight forward. Basically I have the following report parameters:

reportMonth - Just a non-queried list of months for the user to select
reportYear - Generated using the following query from dataset "Years":

declare @curYear int
set @curYear = 2000
declare @yearTable table (repYear int not null)
while @curYear <= year(getdate())
begin
insert into @yearTable(repYear) values (@curYear)
set @curYear = @curYear + 1
end
select * from @yearTable

This generated a list like:

2000
2001
2002
etc.

I then have a 2nd dataset "Main" which I'd like to use both the reportMonth and reportYear parameters in once they've been generated. How do I go about setting this up and referencing the parameters? I've tried a few things but nothing seems to be working.

Thanks