Hello Shuai Yu.
I had the same problem few days ago and here is how I fix this issue, I hope it fix yours too..
Before install 7.7 make sure your computer is running Java 7 Update 45 and Update 45 (64bit)
Now go to control panel and look for Turn windows features on or off and make sure .Net Framework 3.5 is enable.
Install Visual RF plan, wait for the installation... If you are ready to upload your CAD file is optional if you remove some of the layers, as we know CAD files are huge.. So you can make it light and remove some extra layers..
And there you go.. You just upload your CAD file...
If for some reason you still having the same issue.. Install the application using program compatibility troubleshooter...
Right click on the application then select troubleshoot compatibility..
select Test the Program..
When you finish the installation save the setting..
Regards,
Giovanni Saldarriaga