Please reply with the content of the form "View - Map info" so I can check how OkMap reads your ECW (you can use the "Copy to clipboard" button). Then if it's possible send your ECW map to info@okmap.org through a free service for big attachments so I can do some tests. Thanks.
Yomismo, thank you for reporting and support. I've found and fixed a little import bug for ECW maps. I'll release the new version as soon as possible may be one of the first days of next week. Thanks for report and patience.