For programming flash Solo2 SE via rs232 need a cable with a different pin connections. The cable supplied with the receiver will not work. Null modem cable is also not suitable.
On rs232 receiver involved 7 contacts. 2 - to remove the log, 2 - for programming the chip protection and 2 - for programming the flash. 1 - general.
In solo2 mini used only 5 contacts (1,2,3,5,6). There are no 2 contacts for flash programming.
i have a solo 2 se, and supplied cable , flashed via com fine