Please to try down your peer and upload parameter connection in torrent application.

I am using uTorrent 3.2.3.
I've set the upload limit to 1MB/s and the global maximum number of connection to 400 (initially was 800).
I also used the the setup guide from uTorrent, it's an embedded tool that tests the network and configure the client for best performance (maybe this setup guide was useless but i don't know..)

It worked for the last hour but now i have the same problem.. no network access on wireless..

Please less than 100 peer.
What is your internet connection speed?

I set the global max number of connections to 98 and the maximum number of connected peers per torrent to 98.
I have a good internet connection speed, on wireless i have 68Mbps (speedtest.net).

I think this problem is coming from the router..

I set the global max number of connections to 98 and the maximum number of connected peers per torrent to 98.

What is the result? Can you see improvement?

I hope it will work.. until now is working fine

Seems like the router has a limit of 5109 simultaneous connections: http://www.smallnetbuilder.com/lanwan/router-charts/bar/77-max-simul-conn

5109 simultaneous connections

Maybe connections ok, but you give him also up/download for maximum.Then the processor is down.

bubu pune wireless-ul doar pe BG, fara N si zi-mi daca merge, eu asa am facut si functioneaza impecabil,
EN: bubu enable only BG not N and see if it works!

I had 2 problems, 1st wireless drops after few hours and 2nd every time i download with uTorrent (1.8.2 build 28949) for Mac (setting are all Default) since I changec the Channel Width to 20MHz (Max Tx Rate will drop to 130Mbps), the wireless was staying connected and now even downloading 1.5MB/s with uTorrent.

Region : Malta
Model : TL-WR1043ND
Hardware Version : V1.8
Firmware Version : 3.13.12 Build 121210 Rel.73912n (Beta)
ISP : Melita
Devices : 2x Laptops (Wifi) & 1x iMac (Wifi)

Hope that it will work for you too.

Same behavior with firmware 3.13.11 Build 121102 Rel.51321n (Russian).

Lowering number of connections to 90 and number of peers per torrent to 25 does not help: the router goes down if download speed is >3MB/s for some time.