Hi Oskar ,
Thank you for taking the time to write us. The version of RadControls that you are using has a small glitch when it comes to point charts, which is fixed it in the Q2 beta version which you can download from the WinForms Beta Forum. The official version of the fix will be available next week as part of RadControls for Windows Forms Q2 2007
We wouldn't like keep you waiting for a few more days, so I'm sending you the evaluation versions of the chart dlls included in the Beta. This is to save you some time downloading, uninstalling your current version of the product, and installing the beta just days away from getting the Q2 release.
All you need to do is make sure you remove the old RadChart DLLs from the GAC, and change your references to point to the ones I'm sending you.
If you need any further assistance, please don't hesitate to contact us.
the Telerik team