Question : Report Parameter Data Type

Hello Experts,
I currently work on a very simple SSRS report but I could not apply the report parameters.

I have explained my story as 4 different JPG screenshot.And I think these screenshots explains everything.
When I try to appy report filters as constant integer values then I get correct results; but when I try to change them as report parameters then I get nothing.

Please help

Answer : Report Parameter Data Type

Please also screenshot the dataset query tab.