Issue with For loop and/or CMD.exe

Global $start = InputBox("Start", "Enter Start Cluster")
Global $end = InputBox("End", "Enter End Cluster")
Run("cmd.exe")
WinWaitActive("Administrator: C:\Windows\system32\cmd.exe")
Send("cd tsk{ENTER}cd bin{ENTER}")
For $i = $start to $end Step 1
     Send("blkstat \\.\C: "&String($i)&" >> "&$path&"\CLUSTER"&String($i)&".txt{ENTER}")
     ProcessWait("blkstat.exe")
Next