Please avoid duplicating bug reports in this section. (search in the previous posts first, if you find any related post, just reply the post to confirm the bug) https://www.dvbdream.org/howtoreportbug.php
Did you try 5925 on DVB Dream 3.1 Trial version ?
If there is still problem with scanning/signal, please attach your log files (taken from DVB Dream \logs folder) here on the forum.
DVB Dream - because I have to dream about having time to code it