To link your PayPal business account with your Namastream site, please see this article.
To create a business account, follow these steps.
1. Login to your PayPal account.
2. Select the gear to access your account settings.
3. Select 'Upgrade to a business account' in the lower left corner.
There are two sides to the set up. The account and the payment which are on two different tabs as seen on the screen below.
Select 'Get paid on your website'
Switch to Account Setup by selecting this tab.
Go through and answer their questions about your business.
Now go back to your Profile.