Sorry to hear that. You can spend more time to prepare for the exam, like 3-4 months to read MZ's notes, Java Web Services Up and Running and Ivan's notes.
I worked full time and I spent a total of 14 months to prepare.
Do you buy EPractice Lab and Enthuware? I highly recommend you to use the mock exams. Try your best to understand the explanations given in the mock exams. They are helpful. Learning how to take the exam is important.
One more suggestion, this version 6 exam covers version 5 objectives as well. Be prepared there will be 2-3 questions from version 5 objectives.
For example, you have to briefly know what webservices.xml has and what it does. You also need to briefly know the difference between StAX and SAX ( eg iterative
pattern vs observer pattern, more control vs less control, read and write vs read only and etc). You may want to read
J2EE 5 tutorial for more detail about JAXB binding.
You may need to know web service cache/broker (in Ivan's notes) just in case the old questions come up.