Hi guys,recently I've bought a Samsung Tv 40H5203 that doesn't come with a wireless card, it is only wireless ready, after a bit of research on google I've discovered this forum and the wiki part, I've read the tutorials and bought imediatly a wifi dongle(Edimax EW-7711Utn) with the same chipset as those used by samsung (rt2870), on a Ubuntu 12.04 LTS I've managed to compile the driver ( the one uploaded by Mark Greaves for kernels >= 2.6.35 ) but I get an error :
ra0: ERROR while getting interface flags: No such device.

I'm new to linux, and I don't know what to do next, has anyone encountered this problem ? Can somebody give me an ideea ?
PS: Sorry for my bad english, I hope that I've made myself understood.