Changed out clutch lever now rear wheel locked......

I'm guessing you've resetted the cable adjuster/pivot bolt right ?

Evidently, it isn't disengaging the clutch. You're going to have to readjust it, so it actually disengages the clutch. When you swapped the lever, something in the cable adjustment isn't adjusted right, as it isn't actually disengaging, just pulling the lever arm without the clutch disengaging. Go back and recheck your work, as all you are doing right now is pulling the clutch mechanism partway to disengagement.