FirstSortedValue with rank not working in QlikSense

[ENG]

while the firstsortedvalue function works ok without rank variable, i need the 2nd rank value.

Script: FirstSortedValue("Last Price",-PX_Date) as LatestPx

After i add the ranking, it gives a null value. 

FirstSortedValue("Last Price",-PX_Date,2) as LatestPx

I tried both in script and chart. Once i add the rank, it doesnt work. Btw, im trying this in qliksense. I have also validated the same script works perfectly in qlikview without problems. can anyone help?

[PrashantSangle]

Your expression is correct.
can your share sample data or qvf.

Regards,

[ENG]

thanks for reply. please see attached sample qvf. 

Basically i need the lastest day -1 (prior day) price.