Welcome 08freedom -
like I wrote above: Did you actually download and install at least one RoomPack? MIR Pro is a bit like the Vienna Instruments Player software - it needs the samples (i.e. the impulse responses) to fulfill the task it was made for. :-)
... for starters, the small MIR Trial RoomPack (which contains just one Main Microphone Position of one Venue) will do.
-> http://www.vsl.co.at/en/68/428/1957/1622.htm
HTH,
/Dietz - Vienna Symphonic Library