I don't think RFTSx is supported on Linux Sles 11. I saw through Google Search that the maximum supported version is 10.10. No info is provided for the version 11 of the operating system. This could possibly mean that the RFTSx didn't get support for the version 11. However, you should attempt to update or use it in version 11 because it's possible to be implemented through an update or something related.