Restart Parallels H-Sphere.Make sure that MCVE.jar is in the /hsphere/local/home/cpanel/java_rt/ directory. If not, copy this file from the java_mcve-3.2 directory.
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CVV (Card Verification Value). To enable fraud protection using CVV, enable and configure CVV support in your MainStreetSoftWorks account. More on CVV credit card verification.