Problem in passing sold to party valuein va01 with ITS service.

Hi Experts,

I have created the ITS Webgui transaction launcher in ECC and facing problem with the sold to party field value.

1) I have created ITS service to launch VA01 transaction.

2) I have successfully skipped the first screen by passing order type , sales org details.

3) But not able to pass the value to the sold to party field.

Below is the URL.

http://XXXXXXXXXXX/sap/bc/gui/sap/its/webgui/?sap-client=200&~transaction=VA01&VBAK-AUART=OR&VBAK-VKORG=ZKNS&VBAK-VTWEG=ZK&VBAK-SPART=ZK&~OKCODE=/00&KUAGV-KUNNR=100000&~OKCODE=/00

Can anyone tell me how to pass value to the sold to party field i have checked it technical information it is the screen field with structure KUAGV.

Kindly help me to solve this issue.

Thanks,

Siraj.