Measure showing wrong calculation

Hi,

I have tables fact,dim1,dim2 and dim1 and dim2 have relationship with fact.

My measure is Loc_Count=Calculate(Distinctcount('dim1'[col1])),filter('dim2','dim2'[Date]>Selectedvalue('Date'[st_DT])))

Date[ST_dt] is a slicer.and Date and Dim2 have relationship on Date[ST_DT] nad 'dim2'[Date].

So when i select particular date it filters the table2 but it is not filtering table1.

Col1 has 1,2,3 distinct value so it is giving 3 output.

But in table if u drag Col1 and dim2[Date] it is showing zero records as my Fact is empty.

So i need output blank or 0  when user selects the date.cause i dont have data in fact.

I don't know why it is not filtering table1 as well cause dim1 and dim2 have relationship.