important problem with my BB wipe plz help

hi everyone,
i was trying to unlock my BB 8800 from rogers wireless and i was following those steps:
...
after installing all the software needed and the firware i was using is :
8800M_PBr4.5.0_rel108_PL2.7.0.78_A4.5.0.81_Rogers. exe
i start the MFI mutiloader and plug my BB to the PC and everything start nicely but i had this error message :
impossible to perform a cast of an object COM of type ' RIMRADIOCOMLib. RIMRadioObjClass ' in type of interface ' RIMRADIOCOMLib. IConnection '. This operation failed, because the call QueryInterface on the component COM for interface with IID ' {FE9513A0-9002-11DD-BAEA-0002A5D5C51B} ' failed
owing to following error: One does not take care of this interface (Exception of HRESULT: 0x80004002 (E_NOINTERFACE)).
in the BB i had i a blank page saying :no application linked <factory OS>.can someone help me plz. thanks so much for every help.

MFI mutiloader ...

Sorry, nothing we can do to help. That software is the property of Research in Motion, it was never intended for public use.