buffering code with db connection

Hi,

I have a db connect script running in an include file with buffering. Does
anyone know if there are restrictions for this? It seems to work with a
smaller amount of code to be buffered. Is there some sort of limit for
buffering (i.e using ob_start () ... ob_end_flush()). The thing is,
everything else seems to work. Why does the db connect script not work?

Thanks,

Raj