Which exe in SAP WAS 6.40 i need to execute to start J2EE engine

Hi

I am working on SAP WAS 6.40 SP9,

I need to start the J2EE not from the mmc (I know how to start the J2EE from MMC))but by invoking exe's.I was able to figure out that I need to invoke

C:\usr\sap\J2E\JC00\j2ee\os_libs\jcontrol.exe

with argument as

pf=C:\usr\sap\J2E\SYS\profile\J2E_JC00_[your_machine]

but when I execute the same on te command prompt the exe runs but when I use IE browser with URL "http://[your_machine]:50000/index.html" I dont get to see the index page

My work involves runing the SAP WAS 6.40 j2ee engine using ANT.I have to use ant tags to start,create deployment descriptors and deploy the ear.

I would be grateful If one can help me out

Thanks in advance

Sai