why is my wireless internet so slow?

If you are still using win 98 is why if not it's Belkin....You get what you pay for

Please tell us what type of connection you have, not your router.

Sounds like your wireless Router is crap, or it could be your wireless card. If you wireless card is not set up properly. Try uninstalling then reinstalling it.
Here a few tips to speed up.
1. Upgrade your Internet Plan
2. Control Bandwidth Usage
3. Free-Up Temporary Directories
4. Optimize your Internet Settings
5. Update Microsoft Silverlight.
I can advise you to download this software,
Download CCleaner 4.15.4725 - FileHippo.com
Good Registry Cleaner which can extremely will improve your computer and Internet performance dramatically! Do all these and Perform speed here
ScanmySpeed.com once it will sounds better ...