An alternate way of doing this would be to telnet to the TS from a Telnet client which can capture. Login as root, default password: dbps. Once logged in, turn on "Capture" in your telnet client, then enter the command "cpconf term". This will dump the config to your telnet screen, which will then be captured to a file.
More information about this command can be found in the Command Reference:
http://ftp1.digi.com/support/documentation/92000304_M.pdf