You said you checked all the parameters that they use the exact text values that are reference, does that include the case of the text? Per this article:
Can you post the packaged workbook if this doesn't help resolve it?
Now I feel a bit dumb, because I had read that post before and thought I had checked all of my parameter text references. Upon checking again, I found where the discrepancy was. Everything now works perfectly.
Thanks for the help!