.....I would dump the Keyspan, if I were you.
That is good advice from N4NYY.
After spending hours and hours trying to get the Keyspan USA-19HS
to work with my Dell-Inspiron-1525-laptop, I gave up on it.
I bought Radio-Shack's Gigaware device and it works just fine
The local Radio-Shack had it in stock and I got $10 off due to a coupon from a previous purchase.
73 Jerry KM3K