Transmission works with wires but not always with wireless

[skimask]

I am using the Laipac 315 modules and I serout only once and it works with wires 100% of the time. When I try wireless it works once in a while. On the other hand, when I serout 5 times the wireless works most of the time but does not work once in a while. I have add 4 $55 for a preamble and manchester encoded everything.

But yet we don't see any code to base an opinion on what could possibly be wrong!