No Answer on "GA" cmd

I try to control Bose ControlSpace EX-1280C processor with API, use only GA and SA commands. When in IP driver, they worked fine, processor responded as described in manual. When in RS driver, SA aswer looks different, but I can axtract usefull information from it, but GA does not respond with needed values, it echoes initial cmd and then "cmd success". Also processor sends a lot of information I do not need. I need this RS driver.