Hi Iam using my korg pa50 as the master keyboard ive connected the midi cables to my other keyboard which is a yamaha psr9000 I cannot play the chords on the pa50 using the styles on the psr9000 is there any other settings i have to do

For aproblem of this nature, I would suggest contacting Korg directly. Here is a link to their contact page. Contact KORG

The manual should the factory re-initialization procedure. If not contact Korg customer support

Here is a link to your manual, it should tell you how to do a factory reset somewhere in it. Hope this helps.
http://www.korg.com/uploads/Support/Pa50SD-UM-ENG_634618903911880000.pdf

Please see "Loading Korg Pa50SD's Operating System" below for
instructions on how to load the operating system.

It's about hardwares.
Wiring connection sockets is loose.
Inside the korg PA50,Wiring connection to the keyboard is separate to left and right.
Open/disassemble your korg.
Look for connection cable to the left keyboard.
One end is on the keyboard,the other end is at the mainboard.
Unplug both of it, then mounted again.
For master volume,better buy new one.

Are you connecting to the laptop and using it as a midi controller? You can record midi notes from the keyboard and send them to your laptop via USB using any midi sequencer program (reason, logic, etc). Create a midi track, select the input of that track as your keyboard, then hit record to play some midi notes. To hear what you record, you have to set the output of the midi track to whatever midi sounds or instrunents you have installed on your laptop.

If you are trying to record the actual audio sound the keyboard makes, use an audio program such as cubase, sonar, audacity, pro-tools, and either mic the keyboard, or connect one of the other audio outputs (1/4" TRS) to an audio input on your DAW, and record an audio track that way (as opposed to a midi track).

I think it is time for you to buy one new one....That you can but on side for parts.

You can connect it with USB connection to your computer. It should be plug and play, but some drivers might be required.
You can connect it also via MIDI interface: - you will need sound-card with MIDI input connector, or you can use special MIDI device like M-Audio UNO.

how can i play .bup file in computer?

ok here is the solution!!!!!!!!

• we should have a mic pin and audio cable as shown in this pic
• 
connect these cables,and connect big pin to the piano and small pin to the computer (mic or input jack)

now take windows movie maker (start-all programs-windows movie maker). click on narrate timeline (as a mic icon below windows movie maker).

now click start narration on the pc and play your song on the piano. you can see input level highlights. now your song is recording. when your song completes click stop narration and save to the pc. walah if you can't understand this say to me. i can add video. sry for my worst english

Assuming the C-303 has a MIDI out, connect a MIDI cable from the MIDI output of the C-303 to the MIDI input of the symphony module.

Connect two audio cables (mono 1/4 inch) from the symphony module to a suitable audio amplification system OR possibly into auxilary audio input jacks of the C-303, if they exist.

I have a Symphony module but not the piano you have and I have mine connected to a Yamaha organ.