Hello Daniel,
I'm facing a problem similar to the above.
I have to convert Deski 3.0 Reports to Webi 4.0, for this I'm using using Report Conversion Tool (RCT) 4.0, but when I logged into RCT it's not showing the Deski reports.
When I logged in to CMC 3.0 I can see all deski reports and also I can see all deski reports from RCT 3.0.
I'm using administrator account for both servers.
3.x server is not in domain.
4.0 server is in domain.
Previously I was not able to connect to source CMS using RCT 4.0, network team opened ports and stopped firewall then only its connecting to source CMS.
For details go through the link below.
Regards,
Thiru