you can't install 9.1 PL05 on HANA SPS 09, only SPS 07 works with PL06 and lower (PL00-PL06);
PL07+PL08 work with SPS 08;
See here for synchronized details: http://service.sap.com/sap/support/notes/2001393
And here are SAP details on how to go to PL09 from a fresh install:http://service.sap.com/sap/support/notes/2218912
Simple said to go to PL09 you allways need to install a lower PL to HANA SPS 08 first and then upgrade the hana and after that upgrade the SAP B1 to PL09