UltraVNC

I have executed:
winvnc -install
winvnc -remove

Result same!

Also, I am renamed "c:\uvnc\" to "c:\uvnc_8\". After that the service was established successfully.

But why nevertheless it is impossible to establish in a former folder?
OS Windows XP SP2 x86

I remove old winvnc (winvnc -remove) v 1.1.0.2 (intall folder c:\uvnc\) and delete winvnc.exe and other files from this folder.
Then download v 1.8.0.2 and copy winvnc.exe, vnchooks.dll, SCHook.dll to c:\uvnc\)
Then run winvnc.exe, but option "Install Service" unavailable.

Help me, please!