When i go into Tmpeg to join my 2 mpgs together, when i double click the file to open it so i can choose were to stop and start the join! i get an error msg saying could not open this file with direct show (0x80040154)

Now i did manage to get rid of this error msg at one time, how i cannot remember But Even when i did get rid of it all i got was a grey background, no movie picture was there at all, but the strangest thing is, i could still move teh slider back and forth as if the film was there!?

Does anyone know what i`m doing wrong and how maybe i can fix this problem, ive also tryed unistalling and reinstalling again! no joy, just seems to be the same!

All help very very much apreciated!

Thanks