I-Author subtitles

Hi, I followed Doom's guide for "Svcd subtitles and multiple audio", everything went smooth untill the muxing with I-autor. The problem is when I want to add subtitles (OGT active) I got a message "OGT Channel 1, first time over" and the muxing stopped. Does anyone have an idea on how to resolve the problem? :confused:

Your total bitrate is too high. Either redo the audio at a lower bitrate or try deleting the first few subtitles. You should calculate ~50kb/sec for each subtitle stream.

Thank you!!!!! :D