The IRI Survey Official Website shows that they have not released any results of the Survey in the month of September 2012.
Here is the link
http://www.iri.org/news-events-press-center/news/detailed-methodology-survey-pakistan-pulic-opinion-july-10-august-15-2
I asked female news caster and anchor person Gharidah Farooqi about IRI Survey and she also said it is on the IRI Survey Website but IRI Survey Website have not released results of the survey on September 2012.