DNS Server is Unreachable

I cannot quite get the dbox connected to the pc.

When i test network settings on the dbox it says
DNS Server:
192.168.100.100 is unreachable.


Does anyone know why this is and how it is fixed?

Thanks

 

whats the IP address of the dbox and PC
whats the subnet mask of the dbox and pc

 

Dbox is set to
IP address 192.168.0.100
Subnet Mask 255.255.255.0
Broadcast 192.168.0.255
Default Gateway 192.168.0.100
DNS Server 192.168.0.2

The PC Local Area Connection is set to
IP Address 192.168.0.100
Subnet mask 255.255.255.0
Default Gateway 192.168.0.100
Preferred DNS server 192.168.0.2

Thanks

 

change DBox IP to 192.168.0.101

 

Thanks but this is making no difference.
Also now showing as Default gateway unreachable

 

Ok, i have now got the following

dbox:
192.168.0.101: is reachable(ping
Default Gateway:
192.168.0.101: is reachable(ping)
DNS Server:
192.168.0.101: is reachable(ping)
wiki.tuxbox.org:
via IP (88.198.50.98) is unreachable
via DNS: unreachable(host or protocol error)
www.google.de
via DNS: unreachable(host or protocol error)

And i still cannot get it to connect with FlashFXp, anyone know what this problem is?