How do I make a test account to test the plugin in magento? I put the extension in test mode. And when I press "PLACE Order" writes "Your card has not been charged!"
There is a support forum for the free plugin here http://ebizmarts.com/forums and if you are using the PRO module, you can just use the contact form here http://ebizmarts.com/contact-us
Also, the problem you mention is described on the Wiki here http://wiki.ebizmarts.com/sage-pay-common-problems
Especially you can check this link. http://ebizmarts.com/forums/topics/view/7503
Hope this helps you !!