Crystal Report Formula

Hello, I am hoping someone could assist me with a formula I'm trying to create. The UDF field I created for our users displays in numbers but I want to create a form that if the number displayed is x then it should display y. 

For example, "If {SO_OpenOrdersWrk.UDF_USER} = "0000000034" then {SO_OpenOrdersWrk.UDF_USER} = "Jessica"

But when I run the Open Sales Order Report, it says "False" instead of the user name. Am I writing the formula incorrect?

Thank you in advance for your help!

Jess