Ordering issue SSRS

Hi Friends.

I was trying to sort by time24 and in the report level  I was grouping by Tasknumbers.

This is mdx result

This is SSRS report

I was sorting by Time24.... 32 Lynton road should come in the last because they finished at 15:35 which is last time.

I know we are grouping by tasknumber it sort by first time of tasknumber.

it need to sort last time of tasknumber then I will achieve my requirement.

I tried Min function but it is not working .

Can anyone guide me please ?

THanks,

RK