okay im having some problems with my uIEC/SD card reader. i have the .d64 files on my sd card and suceffully loaded PETSCIπ1.D64 (art software) yesterday and accidently went back to basic and now i cant load anything , so the command i used was
OPEN 1,10,15,"CD:PETSCIπ1"
and i opened it up yesterday and now, when i try to use it and type "RUN" it tells me ; ?SYNTAX ERROR IN 1
so any help will be appreciated ive tried other programs .d64 files and didnt work , 
so yeah i dont know if im using the right command or not. and also ive tried to put a file browser on my SD card so that could just boot up on start but i didnt do it right, any help?
