I had the same error when configuring eclipse.ini to use JRE6. Turns out I caused this error by incorrectly configuring eclipse to use the 64 bit JVM while running a 32 bit version of eclipse 3.7.
The correct configuration required the eclipse.ini -vm argumument to use “C:/Program Files (x86)/” instead of “C:/Program Files/”.
Make sure that the JVM version (32/64 bit) you use matches the eclipse version (32/64 bit).