Filtering via parameters while using a shared dataset.

Hi All

another probably elementary question here but one I can't seem to figure out via RTFM or Googling (whoops BINGing).

I have created a SharedDataset in SSDT and saved it to the SSRS server our model for these datasets is to cas a wid net and use them as "aggregations" for people to report  against using filtering to pull out the data they need for the report.

so in the report built using ReportBuilder for ssrs 2016 I have added 2 parameters 

as well I added 2 filters to filter the shared dataset 



however when I save the report and run it I get 

so how do I use parameters to filter a shared dataset