RD-9 and Synthtribe Store / Recall issue

I haven't been able to find much info on this online, so I hope you wonderful people can help point me in the right direction.

I can recall a sequence from RD-9 using Synthtribe connected via USB.

I change the pattern in synthtribe then go to store it back into RD-9.

The dump light glows on the RD-9 but there is no evidence that the pattern has changed on the machine. If I recall again, the pattern is back to original sequence.

Anyone able to store a pattern into RD-9 ?

Maybe I am missing a hidden setting.

I factory reset RD-9 but this made no difference.

Thanks for your help.