Minimum Purchase amount error only in one category

[Vinay]

I have may categories, and i have set the minimum purchase amount to $150,

When a user adds a product his cart, it simply flies and goes to the shopping cart without refreshing the page, but in statues category when a user clicks add to cart button, the page refreshes and goes to orders.php and i get an error saying “There is 1 error :

1. A minimum purchase total of $150.00 is required in order to validate your order
“

Why does this happen only in one category?