I think you should use " instead of ' at the command line, or in the RUN command box.

Build a .EXE from a simple program:

LPARAMATERS tuP1, tuP2, tuP3
? tuP1, tuP2, tuP3
WAIT WINDOW "OK?"


Then run X.exe "test 1 2 3"

It prints "test 1 2 3 .F. .F." to the screen.
parameter 1 is the whole string, parameters 2 and 3 are undefined.