Same problem
@aimber - I'm having the exact same problem with a different app! (for me the app is Air Sharing)
@Dalo - It's not a direct connection. The program(s) aimber and I are referring to is basically similar to if I shared out a file on a computer connected to my network, and accessed it from another computer on that same network. My program - Air Sharing - is exactly like that actually. It should allow me to type in the IP address in a browser, and download/upload files to the program. I've looked at multiple support forum posts regarding this, and tried everything I can think of.
The underlying issue: Even though my router sees my iPhone without problems, my iPhone connects to my wireless network without problems, and my computers also connect to the network without problems (desktop is wired, laptop via wireless), neither computer is able to ping the iPhone or access the program via the suggested methods.
The computers are able to ping each other just fine, but neither is able to get the iPhone.
The strange thing is that I had this WORKING just a while ago (a month? maybe 2?). I've been searching to see if perhaps Apple's new software update to 4.02 screwed something up, but so far no luck.
The iPhone OS is really the only thing that's changed in the intervening time. the program hasn't gotten updates, the router settings haven't changed at all, my computers haven't changed at all...I just don't know what the deal is!
VERY aggravating.