TOS DDE is not working

I have configured DDE in Amibroker but can not connect(showing Wait) to Thinkorswim.
Based on what I see on the forum that may cause the issue my setups looks correct

  1. Running 64 bit on 64 bit Windows 10
    Screenshot (10)
  2. Excel can show data
    Screenshot (8)
  3. Configuration is correct (tried both tos.rtd and tos )
    Screenshot (9)

Can anyone help me solve the problem? Thanks in advance

RTD is quite different protocol than DDE. You can't use RTD with DDE plugin.

Working DDE setup is shown here:

Duplicate of: Thinkorswim DDE interface