No , my card is detected, i can see the output of lspci |grep Ethernet

lspci | grep Ethernet
00:0e.0 Ethernet controller: Realtek Semiconductor Co., Ltd RTL-8139/8139C/8139C+ (Rev 10)
00:10.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10)
02:05.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 05)

As you suggested added the driver name modules.conf like

[root@ismartblr2 network-scripts]# cat /etc/modules.conf
alias eth0 8139too
alias eth1 e100
alias eth2 8139C+
alias scsi_hostadapter sym53c8xx
alias usb-controller usb-uhci
[root@ismartblr2 network-scripts]#

but in Network Device control menu still eth2 is showing inactive only. If i try to probe , it's showing as " No such device"

I am clueless!!!!