No Financial Accounting document found ( FI_DOCUMENT_CHANGE )

Hi experts,

i want to update the ZLSPR Field int the fb02 transaction. I tried using FI_DOCUMENT_CHANGE function module , i am getting No Financial Accounting document found error.

Please let me know how to update the payment block field (zlspr).

What are the parameter i should pass for this function module.

Please give me some input example for the input parameter and table.

thanks ,

reena.