Thanks for the reply.
Well , both the Chapter and Part are in the same .xhtml file.
The only css im using is span(drop cap) no page-break is being applied.
Im using .ncx toc.
This is what the Chapter2.xhtml file looks like right now :
and the Toc.ncx is :
So the problem might because of the dropcap span ?
but is there any way i can use css with these ?