Did you change the oil right before the test?  I had an inspection guy  tell
me that you
shouldn't right before an emission test.  Apparently, when you put in  a
fresh batch of
oil it slops around and knocks off new gunk from the engine which can cause
a marginal
vehicle to fail.  My mechanic told me that emissions tests aren't too  big a
deal for most
VW's--my 87 Westy passed w/ flying colors here in Tx.  If you haven't
changed out your
O2 Sensor in a while, I would start w/ that (or find a more friendly
inspector ;-)
good luck,
James in Houston