ERROR INSTALING V18

[mandycuba]

Hi all.. i get this error when try to install v18
There was an error deleting the partitioning scheme on /dev/sda.
Please helpme
Errors in installer.log:
root@fvdw-sta-kirkwood:/ # cat installer.log
fvdw-sl-installer log
tftpd ip address 10.12.17.39
getting required programs from tftp server 10.12.17.39
Dialog installed
xterm installed
mke2fs-ext3 present
gdisk present
Start fvdw-sl firmware installer version 4.0
cpuinfo= familybox
selected nas type cloudbox platform kirkwood
selected disk /dev/sda
gpt support bootloader selected yes
selected partion table type gpt
Deleting old msdos partiton table
deleting msdos partition failed

[mandycuba]

I resolve this error, installing the v16 firmware and later install again firmware v 18. And the process finish whitout error.
but, i dont see in the network the hdd. and the network led dont work properly... i need help please!!!