Hello zhenve,
There was an issue with the classic recessed menu ring control in CVI 6.0, but this has since been fixed in CVI 7.0. Are you using the recessed menu ring control? If so, as a workaround, you can either:
1. Use the Lab Style Control
2. Use another type of ring, or
3. Create the classic recessed menu ring programmatically
Also, if you open up your 6.0 UIR in CVI 7, replace the ring control with another classic ring control, rebuilt your project and run it, do you see the same behavior?
Hope that helps.