Sap Netweaver Developer Studio fails JVM terminated

On my laptop, when I try to launch sap netweaver studio, it just throws up a dialog saying JVM terminated with exit code 1. Searching the internet I see a number of people have had this problem, most saying fixed by using JDK 1.6 32 bit version. I have ensured using 32 bit JDK 1.6 and included that in the -vm arg to the INI file. I've also re-installed (i.e. Unzipped the download) SAP NWDS. But no luck.

Does anyone have further suggestion, or even how to go about debugging the problem?