Are you using the page name or the prefix of the Declarative Index Join?
Also, I think the property prefix may be case sensitive. In your description and the screen shot, I see 3 different mixes of case - "MyInd", Myind" and "myind". Are you matching the case of the actual object?
The query that is being generated by your report is not evaluating the property name you are passing. It is passing the name as is, and the database will have no idea what "myind" is.
If you are using the Prefix to specified for your Declarative Index Join, I believe this should work.