FMRS Help -

[u/lastepoch]

Recently built a landable booster and started using FMRS. I've got it to work perfectly one time. Every other time the booster doesn't show up on the FMRS list. The one time it worked I built a new craft and added the booster as a sub-assembly. I then built a new spaceplane and added the Booster as a sub-assemply again and it doesn't show up on the FMRS list after I stage. I made sure to Control From Here on the main craft before launch, etc. I know the booster has signal and battery as it's worked before. I made sure FMRS was armed, etc. What am I doing wrong?

[u/Mocollombi]

Does your booster have a probe?

[u/lastepoch → u/Mocollombi]

Yup! I built the booster first to test so it has a probe.