loadVariables - not supported?

[Remya]

Can you tell me how to substitute a variable using the command LoadVariable.
I tried the below code , but its throwing the error "Load variables is not a supported commands for uploaded scripts".
We stored the text file (which is having account details) in the C drive of both the IE9 node
///////////////////////////////////////////////////
loadVariables C:\Accounts.txt <= Here we are passing the path of the text file using LoadVariables
logData 0

// bring up the login screen
navigate http://xxxx/shop/index.jsp?categoryId=2255956
navigate https://xxx/coreg/index.jsp?step=register

// log in
setValue name=email %Username%
setValue name=password Passw0rd!
submitForm name=returningCustomer

logData 1

//search
navigate http://xxxx/search/index.jsp?kwCatId=&kw=bat&origkw=bat&sr=1