ProgDVB x64 e MPEG2

#1
Hello,
i have install progdvb x64 in my Windows 8 system......but when i try to view the SD TV (mpeg2 transmission) the program don't found the mpeg2 decoder.
The version 32 bit, work propertly.
Can you help me to use the x64 version?
Thank's for all and sorry for my bad english