Why does my iMac lose internet connection when importing music via iTunes Home sharing?

Hi, I tried searching for a solution but could not find anything to solve my problem.
I recently purchased an iMac and am attempting to import my iTunes library from my old Windows 7 laptop using the Home sharing function. As far as I can tell, everything works fine - both computers are connected to my wireless network, I can see and connect to the library, I can begin importing my music but after 5 or so minutes my iMac will stop transferring music and I can no longer access any internet sites, even though i seem to be connected to the internet. Turning wifi on and off allows me to access the internet again. I have tried many solutions, but nope seem to have helped. Both computers have the latest version of iTunes. I have tried disabling the firewall on my router, resetting the router, resetting both computers, reopening iTunes.
Does anybody have any ideas as to what could solve the problem? Thank you

jjcardil
I've noticed that Lion automatically reconnects in about 5-10 seconds after being waken from sleep mode.
Make sure that you've set you Network connections up properly in System Preferences and then, after waking from sleep mode, wait to see if it automatically reconnects.
In System Preferences:
Network / Wi-Fi:
Make sure "Network Name" is specified.
Advanced:
Make sure your "Preferred Networks" are specified. (The order is significant).
Also make sure that the "Remember networks this computer has joined" is checked.
Also, you may want to try playing with the "Energy Saver" Settings in System Preferences, perhaps disabling sleep mode but turning off the screen (although I don't prefer this method since it kind of defeats the whole purpose of having a sleep mode IMHO).
-Mike

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