You were just missing the second half of the column statement telling it to remove the entire column, since most normal Ranges start with a Column Letter, it was looking for a number and didn't get one. The ":" gets the whole column, or row.
I think what you were looking for in your Range was this:
Range("C:C,F:F,I:I,L:L,O:O,R:R").Delete
Just change the column letters to match your needs.