Tera Term

If I use the KERMIT protocol to send files to a CP/M system (running kerm411), the transfer runs VERY slowly, with 5-10 second pauses between bursts of packets so I only get speeds of a few bytes a second on a 57,600bps connection, however if I choose a Tera Term menu during the transfer (eg: setup...Additional settings...cancel), the transfer will speed up over 100x. Sometimes I have to go into several menus before the speedup begins. Verified on the latest version (4.100) downloaded today.

Any ideas? Thanks.