VAT Posting Error

Dear Folks,

I am seeing an error msg while uploading my Item master which is attached with vendors in it, I am doing this from config package NAV 2013 the error is# VAT Posting setup doesn't exists VAT Business posting group "" VAT Product Posting group "" ? There is VAT setup already done with 1 business posting group 2 product posting group and mutual business and Product Posting combination too.

Kindly help me on this it's bit urgent thanks in advance.