Array modifier trbl

I’m having trbl using array modifier with an object i created
. With object offset selected I want it to curve .it won’t work. It works if I do it with a cube but not with the object I created which is a scaffold part for inside bldg. I made the object from cubes and planes. When I hit object offset it drastically scales the object into miles lol. In the dimension tab when I try to set correct dimension it dissappears. What am I doing wrong?

No blend file supplied for review !!!

Ensure you ahve applied any scale and rotation before using array modifier (Ctrl+A)

Lol ok I’ll put it up when I get back from work.

Cntrl A worked thank you very much Richard Marklew!