Getting choke and my rates are messed up

[Hacial]

I get pretty much choke at my server, how to fix it? I'm not so good with these rate settings, and I looked here: http://forums.steampowered.com/forums/showthread.php?s=ed0ce48d48d9cf5b562fed38ff890dba&threadid=293285

But, I'm finnish so I don't understand that thing, so I need help getting my rates set. Before the rates were good, but then I changed them for some reason, and I can't remember the old ones anymore. I can give you some info from my computer and server:

Computer:
Intel® Celeron®, CPU 2.80GHz, 512 Mt RAM-memory, Windows Home Edition

Server, rates:
sv_minrate 5000
sv_maxrate 0
decalfrequency 10 (I should change this one... What would be good for this?)
sv_maxupdaterate 70
sv_minupdaterate 10
sv_unlag 1
sv_maxunlag 1

Tickrate: 66

Internet speed: 8/1 mega, Full Rate

Startup command line: C:\srcds\srcds.exe /high /wait -console -game cstrike -secure -port 27015 +maxplayers 12 +map cs_assault -autoupdate -tickrate 66 +fps_max 600

Boosts: SrcdsFpsBoost, /high command in startup line, (not boost but it's servers watchdog-----> srcds.bat)

I know my rates are somehow totally messed up, and I'm so stupid that I don't undestand that, so please help me getting my rates fixed.

[Hacial]

I found one link, what says about servers rates. Now the only thing I need, is your credit card number. (That's was just a joke don't get angry. ) http://www.seemeplayme.com/idealbb/view.asp?topicID=771&pageNo=1
So I did some calculations, and changed my server.cfg rates:
// bandwidth rates/settings
sv_minrate 0
sv_maxrate 7500
decalfrequency 60
sv_maxupdaterate 30
sv_minupdaterate 6
sv_unlag 1
sv_maxunlag 1

This was made by supposing, that I have upstream 700 kb. (Officially I have 1 Mega, but I think I can't run with that rate all the time.)

Well, now my server is up and running well without lag, most of the times. But I can't compete against big servers, like those who have 100 Mb out and in, rented from a company. 'Cause this is home made, without any pays to companies or to anyone. I would like my server if it would have 100 Mb connection and sv_downloadurl, but that's not gonna happen, 'cause I wont pay for some big company.

sob.

[Hollanda]

I'd set maxrate higher, at 12000-15000. Server bandwith has reserve and is not full all the time!