Fire can't debug into DLLs — yes it can

Well, like I said before Fire jumps from program to debug DLL without stop on first line of DLL function causing an error saying that some mono file are missing.

The DLL is built inside Fire in another project at same solution.

You said that could be missing a debug info.
What debug info you are talking about?

in project settings, you can turn on “generate mdb debug info”, which will generate a .mdb file. you need to have that on; it sounds like you don’t.