bond 04X interest payments not posted

I need help with configuring a 04X bond issue.

I created a class of a bond 04X(a fixed corporate bond issue). Everything looks fine there in terms of cash flows. Cash flow includes placement SE1200 and SAM7000 (coupons every 6 months) and SAM7100 (repayment).This is 10 year bond with 6 month fixed coupon.

Next I create a bond transaction 04X/300 based on this class and cash flows only include 0120 / SE1200 - Issue placement and 0870/ SE8701 - initial accrued interest. I can't figure out why there no cash flow for SAM7000 and SAM7100 - interest and repayments. Is there another transaction I need to post to post them or is this something to do with the dates?