aphache attached bandwidth external help link methodnotallowed month port product products purchased selling

Is there any chance i can get a step by step for selling a product with an external link attached to it? I have tried but I keep getting, the following,.

MethodNotAllowed Aphache 1.32 port 80

i could use some help as i have purchased the 18 per month, I am out of bandwidth, and still have products to place.