Are you running an earlier version of the radar mod?
It is now up to v1.02
http://www.subsim.com/radioroom/down...o=file&id=1901
Earlier versions had their own menu.ini.
Nisgeis has removed this file from later releases.
Using earlier versions the menu.ini re-sized the nav map tools and chronometer. It's entirely feasible it also changed the radio, as it is this file that the contain the entries that attach the map to the radio.
(Please note Nisgeis, I haven't tested this - I'm just theorising
)
Try v1.02 Radar mod Roger Dodger, and report back if it still doesn't work.
EDIT: I've just read the release history.
The menu.ini was removed from v1.01 onwards -
'v1.01 update. - Relocated displaced send sonar range and send sonar bearing switches. Removed menu files to make it kinder to TMO.'