Btn change Background in License Page

Hi,
I'm a newbie in NSIS, i'm researching NSIS and WANSIS plugin
I have some problem:
- In license Page when i choose radio button, The BTN Next change color . 🙁
- And i want add two line sperator in License page, in another page i use Custom page or modify in Controllib\ExUI\INI

Pls give me some solution to fix this bug.
Thank you.🙂