What is the source and target OS?
Do you have this on all remote computers?
The source OS was tested from Windows 7 as well as Windows XP SP3.
The target OS has been Win2000, WinXP, and Win7 and the results have been the same no matter the OS.
We do not have vnc preloaded but we have used a similiar process (pushvnc.exe) as lsremote in that it pushes the service, connects, then uninstalls when it is done. Is there a particular registry setting or file left over that might give this error?