array_unshift() [function.array-unshift]: The first argument should be an array in /var/www/cart/modules/uc_vat/uc_vat.module o

instlled and configured this module but got an error like this.. seems insted of the array a nonarray value is coming there

warning: array_unshift() [function.array-unshift]: The first argument should be an array in /var/www/cart/modules/uc_vat/uc_vat.module on line 122.

i had posted this here http://drupal.org/node/520186.

What i did was just copied this modules to my module directory, enabled this module but after this when i am on product edit page i got error like this ..now i doubt this may due to version change i am using 2,4 version of ubercart