The VBscript fires off a "tftp xxx xxx xxx xxx" command using the WshShell.Exec () method<BR>4. The script works fine if I double-click it while logged into a Windows system<BR>5.

Reinstall or run Regsvr32.exe Vbscript.dll to self-register; then this post may help you. To resolve this issue, you will have to re-register the vbscript.dll file. Failed to register a VB Script DLL ...