Unable to update a Who's Who record using BSSV

I want to update a Who's Who record in F0111 using BSSV.  I use this business function B0100087 and below are my code in BSSV

	bsfnParams.setValue("cActionCode", 2);
	bsfnParams.setValue("mnAddressNumber", addressBookNumber);
	bsfnParams.setValue("mnLineNumberID", 0);
	bsfnParams.setValue("szNameMailing", broker.getDesignatedBroker());
	bsfnParams.setValue("szNameAlpha", broker.getDesignatedBroker());

But it failed at this line

int error = bsfnService.execute(context, connection, "WhosWhoMBF", bsfnParams);

The errors I got was

Server Failure while executing business function. Please try request again. :WhosWhoMBF(Who's Who MBF)

Attached are the errors.  Do you know why?  I did a get for that business function and data structure and rebuilt it locally. I tested it using Jdeveloper 11g.