Ok. I discovered that on your server the issue was exactly with % character. And it appears that when it was involved something crashed on .htaccess rewriting level. It even didn't appropriately redirected to vbenterprisetranslator_seo.php so vBET was even not involved yet. I know that it was working without translation but seems that when redirection parameters was involved and % was in URL it didn't work anymore on your server.
Issue solved by cutting of % character from not translated link. I already set it on your server. The solution is to edit custom character replacement in /include/config_vbseo.php. So if it was empty before it will look like this now:
PHP Code:
$vbseo_custom_char_replacement = array('%' => '');