External GPU issue

Applications Hardware
1

Dear all,

I set up a external Gforce GPU using the PE4H (Pcie passive adapter) from HWTOOLS.NET.

I'm able to add and remove the device doing

and

The point is the kernel does not initialized the device correctly.
Here is what dmesg gives after the scan:

lspci -t gives

and lspci -vvv this

So, it would be great if an expert could help me to figure out what's going wrong here.
Is there any chance to solve it?

I thank you in advance,

         �ric.
2

It might help to know what operating system you're using...

3

I'm running Slackware64 13.1