Losing CSS when using seamonkey

[graytimo]

Hi there when i update a website in seamonkey i seem to lose all my css on that current page.

http://www.afterschool learning.co.nz/index.html

Compared with http://www.afterschool learning.co.nz/testimonial.htm l

Please advise

[rules engine]

Can you please validate your CSS at w3c.org? Does not seamonkey provide support?