The AsMA website has a surprisingly confusing process to access their Journal. Hopefully this makes it simpler. You must have an active AsMA membership for this to work.
This is required because after you log in, the links on this page are updated dynamically to include your login information.
Scroll down, and find the ASMA JOURNAL ONLINE link at the bottom of the page. These links have your login information embedded, so it should allow you to access the journal. (Note: Do not click the Ingentaconnect link. This is the old link.)