When you say conversions, what type do you mean. There are several ways to record 'conversions' in Google Analytics. Adwords conversion tracking, ecommerce conversion tracking, goal conversion tracking.

If you are looking to get data on ecommerce transactions, make sure you have told Google that the site is an ecommerce site and that you want to track data for it.

If you are looking to track Adwords conversions make sure you enter the Adwords (not Google Analytics) tracking ID in the "conversion" area of the admin (Google Analytics Configurate) and then turn it on by selecting the proper radio button within that same area.

Along those lines, Conversions for Adwords will only track if a visitor to your site first clicks on one of your ppc ads and then makes a purchase.

If you're trying to track Goal conversions make sure you have the Goal path setup correctly as well as the final 'thank you' page for the Goal URL.

Let me know if that helps.