Please see this thread

Thank You, My DX and CS are hungry for New Sounds

Hope Yamaha will solve the login problems soon, same problem here. I was able to login again after creating a new account with a new e-mailaddress, but this only worked once. After logout and logging in the next day the login failed again. 🙁

If you are really hungry for new DX and CS sounds: You can still download thousands of sounds from my website here and here. Unzip the files, and use a SysEx dump utility to send the *.syx files to your DX or CS. The script that I use to collect the Soundmondo patches doesn't need any browser, login, or WebMIDI connection.

Or - even better - create your own sounds manually on your DX and CS and upload them to Soundmondo after Yamaha has solved the login problems !

I will hopefully get a chance to try some of these this weekend

Thanks
Carlos