.net script Telnet Not Recognized

Hi there,

i have strange issue,

I create .net script to call cmd using ConsoleWindow and so far I get no problem until I try telnet

this is my code

ConsoleWindow.TypeKeys("telnet 192.168.204.1 21<ENTER>")

and I got error

'telnet' is not recognized as an internal or external command, operable program or batch file.

Strangely if I manually (run new cmd) telnet, it passed, only when running from silk test i got this error.

Anyone please suggest me about this issue.