Hi please do this quick fix and tell does it help. It helped on our forum, but I see in your description that you are not redirecting to Paypal by https so I do not know did you write it wrong in your description or it is some other bug. So if it is by https then this fix will definitely help you (will be included in 3.3.1):
1. open /includes/vbenterprisetranslator_functions_url_tracking.php
2. Find:
PHP Code:
if (0 === strpos($address, 'http:')) {
3. and replace it by:
PHP Code:
if (0 === strpos($address, 'http')) {