Available choices in this step are different depending on if you enter the wizard from the desktop or from the tool pane in the web part page. Image below shows how it looks if you have started the wizard from the desktop. Instead of starting the wizard from the desktop, we recommend browsing to the page, where you want to add the web part and then add and configure your web part there. See How to add web part.
To create a SharePoint 2003 web part select SharePoint Services in the Select Web Part Group drop down list and then select the type of web part you want to create in the Select Web Part Type list. If you select the Chart type you also select with type of chart in the Select Web Part Sub Type. Click Next to start configure your web part.