Hi Rajendra,
I'm able to import the certificate successfully...
SAPOSS works fine n all is well.
The only problem is the discrepancy between Service Marketplace's validity date (one year) & sapgenpse's output: July 18 2015
I even tried with a new certificate...
sapgenpse picks up the correct "Valid from" date...
But "Valid to" stays as July 18 
I have the latest sapgenpse & saprouter.exe
Thanks a lot !
saba.