It is a possibility that you may have knocked an antenna wire loose during your replacement. Double check yourself and make sure all wires are intact internally
This could be several things, the agitator dogs might be worn, or the clutch could be bad. You could search google or youtube for a "how to" to diagnose what's going on. Or you could call in for a consultation or repair (this would be expensive and might cost you the amount of a new washer)