Postcode Based Shipping Problem

I have implemented the postcode based shipping with premium extension. but it also include delivery charges even when someone select "pickup from store". how to get rid of this problem.
Please Help........?????????????

Contact the developer of the extension -- it's unlikely anyone is going to be able to help you with a commercial extension.

If it's my Postcode-Based Shipping extension, please contact me at www.getclearthinking.com/contact with your order number and store URL, and I'll take a look for you.