Execute script by "Call" instruction, when the name of the script is in a variable.

Hi Ruben

Alexei's suggestion to use Evaluate was good if you need to evaluate functions. You can use an Execute statement to call subroutines in VBscript.

http://msdn.microsoft.com/en-us/library/03t418d2(v=vs.84).aspx

Also check if the routines are in another unit.

Calling Routines and Variables Declared in Another Unit

http://support.smartbear.com/viewarticle/31618/

Paul