Hi Zach.
I have a Mac, not Windows. But I found some hints for you.
You need to read a few specific pages of the manual for the firewire mkII card, and then check the FireWire control panel in Windows.
https://manualsdump.com/en/manuals/tascam-if-dm-if-fw/151460/29
first - check page 29. Read about the IF-FW/DM MKII Control Panel For Windows:
The IF-FW/DM MKII Control Panel is found here: Start Menu > All Programs > TASCAM > IFFWDMmkII > IFFWDMmkII Control Panel, and it may also be displayed by calling up the ASIO control panel from within a DAW application.
Does the FireWire card appear there, on the Windows PC? Post a screenshot to help others if u need more assistance.
note that, from the manual, “No Cable” means the DM-3200/4800 can’t recognize a cable installed in the slot. That may be on the PC or the mixer side. But it’s a start to solving the problem!
also - please remember the port on the back of the 2408 is NOT FireWire, even though it looks like the one on the DM FireWire card. DO NOT connect the two!
Good luck, please do read the manual page I mentioned, check your Control Panel, and read more in the manual for how u might solve the “no cable” error.