Hi All, I tried to find any thread about the same problems. but i couldn't find any whit a good anwser. I tried a view things as mentioned in other threads to solve the problem but so far nothing.... Our stuff: 1x LD2000 Basic 2x LD2000 Intro Connected as follow: Laptop -> Cat-5 cable -> LAN switch -> (very short) cat 5 cable -> QM boards in rack housing. -> lasers / dmx etc..... Running the LD2000 on a laptop, a Dell XPS M1530.(a 10/100mb line) with Windows 7. Between the laptop and the LD cards we use mostly a 100m Cat-5 cable. in the firewall we made an exception for LD. So i think that couldn't be a problem. But, It runs sometime very slow, so slow i can't work with it. the other times it runs also slow, but it is workable. When i test a show (with lasers and the programmed DMX fixtures attached (8 LED lights, 6 channels)) it runs also slow. i put the preview off, so the program only sends laser and dmx singnals to the QM boards. But the lasers 'skip' parts of the show. what i mean, a straight line turning once about the X axis it stuttered. and sometime it skip a part like 1/8 of the circle. For show this isn't acceptable for us and the costumer. Any body ideas? Before some ask us, we tried to start pangolin and play the show with a very short Cat-5 cable (3 meters) but the same, like we didn't change the cable. The laptop we use is a standard laptop, not very fast and powerfull. can this be a problem? Hope somebody has an idea to solve it. Have a nice day all!