>I am using 30pf cap for
>C1 and C2 of the crystal and am running the PIC in XT XTAL  mode.

Try reducing this capacitance to 10 or 20pf.  If that doesn't work,
and you are willing to add some additional cost, you can often "pull"
the crystal with a small adjustable capacitance that is in series
with the crystal.

                       Regards,
                          Mike