Have you tried to go back on your main computer to the 192.168.1.x subnet and put the ip you set aka you wanted 192.168.0.40 but you put 192.168.1.40?

If you do not where it i you can use an IP scanner and put range 192.168.0.1-192.168.0.255 see if it shows up then try 192.168.1.1-192.168.1.255 and see if you get any response form any of the IP's.
You can do this from any ip on your computer so no need to change your ip to do the scan.
Here is one of 1000's of different IP scanners:http://sourceforge.net/projects/ipscan/?source=directory

I am unable to remember the name of the one I use on my laptop but if that one does not work I can find out the name and link of the one I use that works well.