Looks like you need this driver
DFE-530TX+ Rev. A, B, C rtl8139.o lib/modules/*.*.**/net
rtl8139 which sounds like a realtek card to me
Here's where I found that info
http://support.dlink.com/faq/view.asp?prod_id=487&question=General Linux
DFE-530TX+ Rev. A, B, C rtl8139.o lib/modules/*.*.**/net
rtl8139 which sounds like a realtek card to me
Here's where I found that info
http://support.dlink.com/faq/view.asp?prod_id=487&question=General Linux