Using Global variables in Unit Script

Trying to learn scripting, and have a simple script that opens a webpage and logs in. I have successfully gotten this to work using local variables, however I want to use persistent variables that can be reused in other scripts. So I created a new variable with a type of 'String' as such:

Name: PageLink

Type: String

Default Value: http://www.mypage.com/login/

Local Value: http://www.mypage.com/login/

 

In my script, I can open the browser to the page if I set the variable locally, i.e:

Sub Login
Dim Env
Env = "http://www.mypage.com/login/"
Browsers.Item(btIExplorer).Run Env
End Sub

That will open IE to the page set in 'Env'.

 

If I try using my global variable:

 

Sub Login
Dim Env
Dim Variables
Set Variables = ProjectSuite.Variables
Env = Variables.VariableByName("PageLink")
Browsers.Item(btIExplorer).Run Env
End Sub

Then I get the error message: "The Variables object does not contain a variable with the "PageLink" name".

 

I'm not quite sure what I'm doing wrong, or how I can tell my local variable to get its value from my global variable?