Problem with SubString in Hyperion

Hello, ok im having a problem with the function Substring. As far as i understand this function allows me to get the data of the id from a member.

In the next example im trying to get the data of the current member in my table so in smart view i can see that data. For example, for the member of Entity i hava "E0455" so when i use Substring, 1, 5, i expect to get the result "0455" but instead of that in my smart view all i get is "0" as a value in all my members, and i dont know why this is happening, is something wrong with my syntaxis ?