Hi,
Tell me if I'm wrong but although VM1.1 is not supported anymore, I think VM2 is still supported on VM1.5.
I noticed this bug in vmpsplugin.php line 1085:
Fatal error: Call to undefined method JApplication::getHash()
$name = Japplication::getHash ($config['session_name']);
Could be easily replaced by
$name = (version_compare(JVERSION,'1.6.0','ge')) ? Japplication::getHash ($config['session_name']) : JUtility::getHash ($config['session_name']);
Quote from: jmagne on October 28, 2012, 04:35:09 AM
...I think VM2 is still supported on VM1.5...
Not really, if you read this announcement:
http://virtuemart.net/news/list-all-news/426-end-of-life-for-virtuemart-11-heidelpay-now-in-virtuemart-2012
(I don't know if the core developers will still do bug fixes)