Hi Friends Stand about my poor English think very sorry. I QM2000.net Box (Laptop Friendly) ,Lasershow Designer 2000 users. Running the following problems occurred suddenly. LD status / error number 5 QM2000 expected different number of command arguments. could be that the files LD2000. DLL and LD2000. QMS are mismatched (from different release). Is it a mechanical problem? Program is the problem? Thank you.