Internet disconnected when downloading

[Sonu]

Every time I am downloading something off of mIRC at speeds greater than 200kb/s+, my internet disconnects (and I have to restart my computer for it to work again) -- this happens when I am connected directly to the modem or when I am connected to the router. But the thing is, when I connect via wireless and download off of mIRC, I do not get disconnected (though I only go about 200kb/s). 200kb/s is a lot, but I have reached speeds of 700kb/s when connected through the modem before I get disconnected -- so I would like to experience the speeds I am paying for. Also, when I download off of BitTorrent or through a website and go 200kb/s+, I do not get disconnected.

I came here with this problem a couple of months ago, but every thing I did (changed settings in TCP optimizer, moved modem away from router and other electrical devices) the problem was still there. (http://forums.speedguide.net/showthread.php?t=216671)

When I went home (I am at school and in an apartment), I connected my laptop to the router there and tried to download something off of mIRC, but I still got disconnected. But, when I used the PC, which was connected to the router as well, it did not. So it's a computer specific problem...

I was on another forum, when I read about some guy having the same problem as me, but with BitTorrent and someone helped him and I am just wondering if what he was told to do, can be applied to me -- http://forums.whirlpool.net.au/forum-replies-archive.cfm/807138.html

Thanks.

Just in case:

Rogers Express: 7.0 Mbps download and 512 Kbps upload.
Windows XP Home SP2
D-Link DI-264 router

« SpeedGuide.net TCP Analyzer Results »
Tested on: 09.13.2007 12:50
IP address: 74.112.xxx.xxx

TCP options string: 020405b401010402
MSS: 1460
MTU: 1500
TCP Window: 17520 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 17520
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 701kbps (88KBytes/s)
BDP limit (500ms): 280kbps (35KBytes/s)
MTU Discovery: ON
TTL: 116
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

[trogers]

Turn power to the modem off for 5 mins.

Try the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU 1500
TTL - 64
TCP Receive Window - 256960
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - checked
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 1
Host Priority - 1
DNSPriority - 1
NetbtPriority - 1
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

[Sonu]

I just downloaded something at 640kb/s for 10 minutes and I did not get disconnected...finally!

Hopefully this sticks and I don't get disconnected again. I find it funny that last time you helped me with this, I did more work...but this time just the optimizer did the trick (with a slight change: TCP Receive Window - 256960), but I ain't complaining.

Thanks, trogers.