You are probably hitting this issue: http://wiki.wireshark.org/CaptureSetup/Loopback
You aren't really sending any network traffic by hitting 127.0.0.1 since that is a special address. Thus by default nothing shows up during inspection.
Sending it to your local IP should be a workaround, though you might need to make a firewall exception. I've seen both cases happen, actually - the system trying to be helpful and resolving the local IP to localhost and nothing happening, as well as the packet bouncing off the router. Right now, for instance, my linux box resolves my local IP to ray.lan (my box), and my WAN (internet) IP to dsldevice.lan (the router), so in the former, the packets I send are going through the loopback interface, and in the latter, the router is just echoing back my pings.
If worst comes to worst, you can always create a virtual local network.
Edited by Bacterius, 24 January 2013 - 02:14 AM.
The slowsort algorithm is a perfect illustration of the multiply and surrender paradigm, which is perhaps the single most important paradigm in the development of reluctant algorithms. The basic multiply and surrender strategy consists in replacing the problem at hand by two or more subproblems, each slightly simpler than the original, and continue multiplying subproblems and subsubproblems recursively in this fashion as long as possible. At some point the subproblems will all become so simple that their solution can no longer be postponed, and we will have to surrender. Experience shows that, in most cases, by the time this point is reached the total work will be substantially higher than what could have been wasted by a more direct approach.
- Pessimal Algorithms and Simplexity Analysis