have dfe530tx+ nic, I got driver form this site, extracted it to floppy, but when i add hardware, it cant find the driver. So my nic is not working

where did you get the card...card may be bad itself, it is possible that the copy over to floppy may have damaged driver file? try to download different driver, reinstall, see how that works..if same prob. occurs, get a new card! END OF PROBLEM!