HI,
There is something wrong with my site. When going to check out, it showed a blank page, and said "zencart ups class httpclient not found". Any one know how to fix it?
It's v1.3.9h version. And my site domain is less4gadget.com

PS: it's ok to place an order, and it still has no problem when going to caculate the shipping fee, but when i clicked the "continue" button, it can not redirect to paypal.com, but just give me a blank page.

Any help would be very appreicated.

Tiger