I installed magento 2.0.1 and working in developer mode.Now the problem is whenever I change css its not get reflect into pub/static folder . I could refer this Magento2: Re generate css file in pub/static folder but no luck. Before its working fine, Now only its getting problem.

folder permission : 755 and also try 777 but no luck

anything we can do apart from this

note: I am wondering, whenever deploy static content that time also not generated my new updated css old css only getting load and also when I delete any css from my theme pub/static folder its not get generated but, before it get generate after loading page.

Thanks in adance