New computer won't work with Artista software

Question

I have a Bernina 180 with v. 3 software. I recently got a new computer with XP, which was what I was using on my old computer. Now I can't get the software to run at all. I installed the dongle and  the hasp drivers but I keep getting an error message saying that it doesn't recognize the security devise. I then tried to use my laptop which also runs XP and I can get it to open the software just fine but the computer doesn't have a serial port so I have to use a USB to serial port cable. I've done this before but now it sends up an error message that says no link to serial port. I've used my laptop before with this machine but now for some reason it won't work. I've used 2 different cables but neither one will work. Any suggestions?? Thank you in advance for any and all help.