Nero photoshow deluxe 4 how to get 4min video to work

I’ m hoping someone can help me. I’ m trying to put a 4 min. video in the show
but it only let’s 15 sec. help

it’s probabaly not happy about the the type of video file.
If you let me know the type of file, size, resolution etc i’ll see if I can find a solution.

This is not directly the answer to the question, but if you can´t solve it…I used Adobe Premiere Elements to put about 100 photos + a sound track (3 or 4 overlapping in some places), and a 4 minute video onto one timeline…exported to DVD. Worked perfectly