Changes done in development system are not reflecting in dev system, but are importing to quality

Hi Experts,

I am working on NWDS 7.3 and made some changes in the landing page of my portal. But I am unable to see the changes in the develpoment sytem. I imported the changes to quality systema nd able to see changes there. We are using NWDI for deployment. Also we restarted the system for clearing caches....

What could be the problem...please guide me

Thanks,

Aswini