This is really wierd. I have my PICAXE 18X and 28X1 connected to communicate serially, but it doesn't work very well. Here is the code on the 28X1:
serin 0,N2400,("go")
high 7
pause 100
low 7
pause 100
serout 4,N2400,("go")
serin 0,N2400,(b0)
high 7
pause 200
low 7
serin 0,N2400,(w6)...