virtumart new bee

[ravi]

i am new to virtumart i have just download the virtumart 2.0.8 from http://virtuemart.net/downloads
and created a product and when i used to go to the detail page of that product but there i can not see the add to cart button i am new and i dont know y it is so .. i have tried to give default categories on my menu. so when i clicked on menu. the virtumart categories going to open but there is no add to cart .. button ..plz help

how to get the add to cart button

plz .. argernt help needed i am using joomla 2.5