It is payments standard and you don't need SSL in anywhere. SSL is useless with paypal standards.
It might be related to paypal payment plugin settings. Have "SSL Disable" in everywhere in your Virtuemart backend.
Also check your paypal backend and disable this option in your paypal account as well. Because in the paypal account settings, (in settings in
www.paypal.com but i don't know where exactly) There is an option something like: "Accept only transaction through SSL, and eliminate others." Maybe this feature is activated in your paypal account.
Regards.
Forum Support.