There are "real USB" phones and those use DKU-2(old model) or CA-53(new model) cables.
There are real USB phones in both "phones" category and smartphones category. So you always have to check.
Then there are some phones that still have the old "serial cable connectivity", but the cable contains some firmware to make the conversion such that the cable can be connected to USB port in PC. These cables are DKU-5(old model) and CA-42(new model)
For old DKU-5 cable you need to install separate driver, but for the other models the driver software is inclued in Nokia PC Suite.
And by the way, there are some reallynew cables out there CA-70 I think that also charges the phone while connected, that driver is also included in PC Suite.
Your phone requires DKU-5 or CA-42. And since you have bought a non-Nokia cable, you might have a cable that is just "look alike", but the firmware inside eighter does not exist or does not do what it is supposed to do.
There are people who are saying that they have a non-Nokia DKu-5 or CA-42 and it works, but I have clearly see more who say they can't get it working.
On the other hand, people rarely write anything if everything just works