CSS script disappeared in Dreamweaver

Hi,

I was working on my website and it worked perfectly well for the past few months but suddenly the CSS script is not showing on my css styles, eventhou I have linked it. Summary for selection for current says that No CSS properties apply to the currect selection. Please select a styled element to see which CSS properties apply.

The script is in the source code but it doesn't seem to be working as I am getting other fonts on my website when I published it online.

Please Help!

Thanks