IB streaming real time futures data

I was following the documentation for streaming data from IB and when I tried to get the data for ES futures by adding the symbol "ES MAR 21-ECBOT-FUT" it didnt work I tried a couple different combos such as using GLOBEX and still nothing. I think its a issue with solely the symbol because I was able to get MSFT data.
Any ideas of what Im doing wrong?


ECBOT symbols must have certain number of spaces as explained in this thread:

Please use that single thread for symbology questions.

Duplicate topic on IB symbology.