I will state the obvious: Without drivers
that work with Windows 7 the device is obsolete in relation to Windows 7.
The company only offers a Vista driver
. That Vista driver may work, installed in compatibility mode, in some systems running Windows 7 but not in others. That is because the driver must be compatible with the OS and
the system hardware as controlled by the OS.
That said, the fact that the driver installation installs may yield hope. Try this: Uninstall and remove all related software and drivers you can (manually), then do a System Restore to a point before you installed the driver the first time.
Then, without the device connected, install the driver in Vista compatibility mode. Once installed, connect the device and see if Windows detects it and it works that way.