Derived Column Expression

Hello Everyone,

I have one column CandidatePlaced (Data type Boolean).

Using data conversion i changed data type to DT_WSTR and then i used derived column to manipulate the data. Ex. 1 = "Yes" and 0 = "No"

[Candidate Placed ?] == "1" ? "Yes" : "No"

But at end of result i got all the columns as No. Some should be Yes.

Please tell me where i'm wrong.

Regards

Parth Patel