IF else condition in Universe based on Bex Query

Having issues with creation of if statement in universe (Created on top of bex query.)

I am getting a dimension [Country Key].  need to create a IF else statement on it. like(if([Country Key])='US01/US11' then 'Unites States' else [Country Key]

after going through this post IF ELSE condition in Universe for Source: SAP-B... | SCN i created below statement

<EXPRESSION>IF(@Select(Region\Country Key)='US01/US11','United States',@Select(Region\Country Key))</EXPRESSION>

but its throwing an error, is some thing wrong with my XML syntax??

Using UDT 4.1

Thanks.