Sometimes when sending discrete commands in a macro you must send the command twice with no intervening delay. (I have found this particularily true with Sony.) I notice that Chris did this in some of the macros he has in his ccf file. Look for example at his Unit 3 On and Unit 3 Off macros.

I am in the process of programming my own X-10 system but have not yet worked out the details.

Please post what you find out.