Beginners help: USB Ports are busy

[DTS]

Hi there,

I switched to Mint 18.2 today. Everything went well, the step from W10 to Mint whas not so bad. Must admit that u used some tutorials to fix some programs.

Now i have a problem with my USB ports:

Schermafdruk van 2017-08-14 15-06-18.png

A few of them work directly in my PC and theŕe working fine. That is a webscam, Dymo lablewriter and a USB Flash Drive.

But the equipment i work with goes through a HUB. Linux sees my usb devices but when i try to use them in my programs i get a popup with the note:

Schermafdruk van 2017-08-14 15-05-42.png

I think it has something to do with permissions?

Who could help a dummy further?

With kind regardz

[DTS]

P.s.:

Ik ben Nederlands dus reply in NL is ook mogelijk.

tnxs