I like to see what has changed.
READ THIS
http://www.faa.gov/about/office_org/field_offices/fsdo/ict/local_more/media/2008-IAprogram.pdf
then this
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/list/AC%2043-210/$FILE/AC43-210.pdf
see if you think the field approval has been shut off.