Open an existing etabs model version 9.7.4 by etabs2013

[mohragab]

I had an existing model version 9.7.4 and I had opened it by Etabs 2013 (exactly the same model),and I noted that Etabs 2013 does not has IBC2006 in the definition of either response spectrum function or load pattern.After analyzing the model by Etabs 2013,the base shear gained from response spectrum function were duplicated (exactly same model).Is there any one can help me of inform me by the factor of coefficient which should be modified to get correct results.