HE300 Codes

[SDISDI]

Hi. I have just bought an HE107 light switch with I believe works with an HE300 remote. I only have newer hardware remotes, so not sure what range of codes these put out. Is anyone able to give me a sample code I can try with (to TX from my RFXCOMM). Testing random sequences and it won't learn, so I wonder if it only recognises a smaller subset of codes from earlier remotes.

Thanks.
(Apologies for the cross-post since I have also mentioned this on a thread about the HE107)