Error with dotNET.System in TestComplete10

uppdaterad version 10.0.531.7

i write on Jscript

in function Convert a file to Base64

http://support.smartbear.com/viewarticle/19898/?_ga=1.17754044.402622273.1390314451

i have error( 

'dotNET' is undefined

in TC9.30 all was well!!



what's the problem?

thanks!