Rear wheel doesn't rotate when pedaled
I had my old bike shipped to me (tennesee to boise) and put it together without to much problem. Inflated the tires, got on it started to petal and almost fell flat on my face....
Origionally when I pedaled forward the cassette would spin freely, and when backwards the chain would sag.
What I have done so far is to take apart the rear wheel to the extent that I could, which is at the point right before I can disassemble the cassette. I do not have the know how, tools, or both to strip the wheel, but I did what I could. I put it back together a few times and tried to get the wheel to spin as I pedaled. This didn't work.
I started to mess with the derailure, adjusting the screws and pushing the lever forcing it to shift as I hand pedaled. Sometimes it would catch and pedal without a problem. Other times it would spin freely. I currently have it to about 50/50 where as before it would never spin.
Thanks for any and all help!!!