Yes I did login to your site and tried to import the data, but as you say, there is an issue while importing. Import is failing even when I try to import the samples provided by the plugin author. I am contacting the plugin author to get some answers regarding this. But I think it has got something to do with the site configuration.
Meanwhile, if you send me the ftp login, I will forward it to the developer who might be able to rectify this issue, if it is related to some faulty settings. Thanks!