HiI have a dell xps l502x running on windows 7 home premium. I recently bought a 5550 wwan card ( Ericsson F5521gw 2XGNJ) for which i tried installing dell wireless 5550 driver. it was not successful and i got the message saying authentication failed and no compatible device detected!!!Windows device manager identifies the card as "OTHER device F5521gw" which probably means that the hardware is installed properly.I have tried installing this Driver Details | Dell US driver multiple times and every single time i got a message saying"Driver installation failed. No compatible Dell Wireless HSPA Mini-Card has been found on this computer. Please insert hardware and restart the driver installation.