Thanks for your suggestions. I tried the A-B way, but doesn't work.One other thing to consider,
is where are you "earthing" the scope probe to to take a measurement ?
The DVM is measuring a floating signal.
the scope is measuring relative to earth,
Either us a differential probe ,
or use two probes,
one to either side of the resistor
with the gnd of the probes connected to power gnd of the circuit.
and measure the difference ( one use of the A - B function of the scope )