Nevermind the first problem IRQ_vec is defined in min_mon, however it still wont assemble it will open the assemble screen up for like a second then go down nothing happens
I've never used that particular assembler, but it sounds like it probably completed all of its passes error-free, and just didn't have anything else to report. The author of that assembler might be from the "no news is good news" school of thought.
Did you specify any output files, using the appropriate pseudo-ops or command-line options? Without them, you haven't really done anything noteworthy, other than validate the source file.