problem for twinhan visionPlus 878 with New ProgdvbNet

When i want to serching canal some times give me nothing and some times found some and during search the progdvb hungup and doesnot respone for any event .

1. instal new ver prgdvb and the problem still .

2. have this card twinhan 878 and install TwinhanDTV2.608a sftware
i use mytheatre software i didnt have any problem with mytheatre

i try to find solve this problem to onether forum and i see many people have a same problem but is not success.