Subject: Why did my experiment concerning starch turn out differently than expected?

I have recently been working on an independant project concerning saliva's 
ability to process starch (a cracker) into glucose. Using urine analysis strips 
and iodine reagents, I found that when the crushed cracker was stirred into 
a "stomach solution" (HCL, Pepsin solution) and saliva was added, the reaction 
stopped. Results were compared to previous experiments when cracker was stirred 
with plain saliva, etc. No other variables (i.e. amounts of liquids, etc) were 
changed. I have read that the reaction is supposed to continue. What went wrong?
Thank you!

Re: Why did my experiment concerning starch turn out differently than expected?