Well this is what I would do
1. Turn all PC's off and silex and reboot router
2. Turn silex on. Then once its up and running 1 PC
3. Go to router config page
192.0.0.1 in a browser or something like that if you don't have an icon for it.
Look at the status page and it should give you attached devices. The first one should be your silex look for its MAC code its a heap of hex numbers and write it down.
Now on your router there should be a config page to allow you to assign a fixed IP address if you put in that MAC address you wrote down and give it a fixed IP address with the 3 first sets of numbers the same as the status page but ending this time in 100 for the last three numbers.
Then reboot router then silex again.
The reason for this is because everything prefers a fixed IP address for a network resource many don't bother but its pretty bullet proof if you can be bothered and also helps trouble shooting. I always do this with fixed resources others don't and may say you don't need to bother but it has always been worth it in my opinion.
Quick check of the router and make sure its been assigned the new IP address ending in 100.
Also make sure that the first 3 sets of numbers are also the same.
When starting your silex configuration ensure the DHCP is checked in the network box.
Then if you get a cmd box up (the old dos box)
type "ping xxx.xxx.xxx.100" and it should come up with a heap of bollocks about packets and times. If it doesn't report back here.
What this does is check that the 2 boxes can talk to each other over TCP/IP.
Then follow the instructions for the client software.
I have a sneaky feeling its a IP network problem that once you have sorted that out the rest will work.
This is the installation manual I have found on line.
http://www.silexeurope.com/media/set...upguide_eu.pdf
Please do try it again but I can understand you have better things to do.
I do apologise if my instructions don't follow logically to you.
I find it quite hard putting in writing what seems to me a logical troubleshooting flow.
Feel free anyone to pick holes or add steps to make it easier to understand.