Dell POWEREDGE 2900 Server "pxe e61 nic" Questions

PXE-E61 failure while booting Dell poweredge 2900 server xeon 1.6 ghz/ 8 gb/ scsi 72 gb in 6 HDD, 2 NIC cards, dvdrom, no OS Its a Network boot process ( Earlier Boot Rom ) Disable in BIOS setup or ...