Rob,
I found this exam quite tricky too, not so much because of the huge amount of content but moreso the way they tested it (ie the wording). What you have to do is firstly try and see if it was the knowledge factor that was the issue- ie knowing all the sub criteria for each section is critical - that means using Averys book to substitute AFT or whoever elses you are using. Usually 2 produce a much better outcome and more questions to practice with.
I recommend you take a few weeks to study for it, allowing time to absorb the info slowly rather then try take it all in one go- worked for me!
PM me for any further questions..