i'm having the same problem as iinote. i can log on my account, and select server, but after that it shows two different sprite errors and then that gravity error handler thingy... sounds like some files may be missing
here is a picture of the errors
Is this with the old Sakray download (the one before costume tab)? If so, download the 13.3 w/ costume tab one.
If it is the newest downloadable Sakray, I suggest you reinstall and repatch.