I want use an AD7730 for a weigh scale system with 8052 microcontroller.

I use one loadcell in my system , and excite that with 5 Volt & connect the outputs of the loadcell to AD7730.
I need my serial port for another application thus use

P3.3 for DRY
P3.4 for CS
P3.5 for SK
P3.6 for DI
P3.7 for DO

I can performe the following oprations.
1: Write zero scale calibration command on the part.
2: Write full scale calibration command on the part.
3: Write filter command & data on the part.
4: Write DAC data on the part.
5: Read any register of the part in single read form.

But when i want read Data register in continuous mode
that seems my loadcell not connected to AD7730 and
my output word is random.

If i forget any thing please help me.