problem with Netweaver java edition sp16

netweaver java sp15 nstallation completed successfully.

I started the instances from the management control and they started perfectly and everything was green.

but when i tried to access the WAS through http://localhost:50000 , i am getting page not found.

can someone tell me why this is happening?

I installed the abap edition before the java edition.

DO you think that is causing the problem?

help is highly appreciated.