Windows 98 requires certain settings in order for your computer to communicate over the internet.  

Have a pen and paper handy and WRITE DOWN the original settings BEFORE making a change. In case something doesn't work, you will be able to get back to where you started this way.

Double-click the My Computer icon on the Desktop, then double-click Dial Up Networking.  Right-click on your Inwave connection and click Properties. The area code/phone number boxes will be at the top and there will be a button at the bottom: Configure and a tab at the top: Server Types.

Click on the Configure button. It will list your modem port, speaker volume and maximum speed. Go up to the top and click on the Options tab. At the bottom, put a check in the Display Modem Status box and click on the OK button at the bottom.

You should be back at the general screen for the Inwave connection.

Click on the Server Types tab. The type of dialup server should be: PPP, Internet, Windows NT Server, Windows 98. If it isn't, click on the triangle to the right of the type and scroll down the pop-up list to get to the correct type.

Under Advanced options, you should just have Enable Software Compression checked, the other options should not be checked. Under Allowed network protocols, you just need TCP/IP checked. Click on the TCP/IP settings button.

The top line: Server Assigned IP Address should be checked, and the 3rd line: Server Assigned Name Server Address should be checked. 

The bottom two check boxes should have checks In them (Use IP Header Compression and Use Default Gateway on Remote Network).

Click on OK several times to save your changes and get out of the dial-up networking.