Dishwasher wouldnt drain when pipe is connected

[DIYproj]

Hi people

 

I just bought dishwasher for first time and it runs perfectly while drain pipe is not connected. No issues draining.

But, when I connect the drain pipe to drain under kitchen sink, it give error and wouldn't drain.

 

See picture on how I connect

 

Any help would be appreciated :)

[DIYproj]

I managed to find the issue. The white pipe connected to the grey pipe was blocked with dirt. I didnt see it earlier as the sink side was draining fine but the dishwater side was actually blocked.

Now the dishwasher is draining perfectly