When you run a test from Lonworks Plug and Play on your dell PC the card fails the test.
Dell laptops E6410, E6510, and E5510
There is a known issue with theses laptops and a PCC-10 LonWorks card
To solve the problem with Dell E6410, E6510, and E5510 laptops and a PCC-10 Lonworks card follow these solutions provided by Echelon. Link to solution