Thanks Jan.
I works on my laptop with v. 1.9.2. even on the different network environment.
As you mentioned, it checked the specific network interface.
Fontunately, it is available on my laptop whenever I load the program.
When I try to install v. 1.9.1 or 1.9.2 on my desktop, it asks MS .net framework v4 on window XP
Kind Regards
Jery