@drewpearce, no logs - mean that there is no relevant entries in log files.
I think i found what’s wrong.
I just founded that i can access my custom database tables in platform, attached to Local DB SQL service. So, i can use them, and this is ok.
My database is located in same place where is dreamfactory database located. I thought that i should create a new service, and use my SQL db as remote.
Thank you for reply, anyway!