
What happens is IP addresses run in a 'range' type setup. For example, say your IP address is 187.98.87.12 - anyone who has a similar IP address like 187.98.87.13 is likely to be downloading something from a server with a similar IP addres and it confuses the 12 for the 13. It wouldn't matter because the first three sets of numbers are being used and that's what RapidShare goes on. There are some other suggestions to get around the problem:
Short-Out the JavaScript:
1. Goto the page you want to download
2. Select FREE button
3. In the address bar put the following: javascript:alert(c=0)
4. Click OK
5. Click OK to the pop-up box
6. Enter the captcha
7. Download Your File
Request a new IP address
1. Click Start
2. Click run
3. In the run box type cmd.exe and click OK
4. When the command prompt opens type the following. ENTER after each new line.
ipconfig /flushdns
ipconfig /release
ipconfig /renew
exit
That one won't work if your IP address is fixed. To check in Windows:
Click Start > Control Panel > Network Connections > Local Area Connection (right-click) > Properties > Internet Protocol (TCP / IP) > Properties. If Obtain IP address automatically is checked then you will have to wait; otherwise you can change your IP at will.
Use a proxy with SwitchProxy and Firefox:
1. Download and install Firefox if you have not already
2. Download and install SwitchProxy
3. Google for free proxies
4. When you hit your download limit, clean your cookies and change your proxy
You could also try using AltaVista.com and click BabelFish. Translate the web page from Japanese to English - this has worked for me several times before.
About the wired vs wireless connections - if the two are sharing the same or similar IP address which they most likely can (is one or the other or both connected at the same time?) then one might be tripping up the other.