its so Simple.
1.Select the proxy in model
2. Right click & select Reload from the new window
3. after click on reload you must have to select the original skp file of that element & click ok.
4. Boooommmm your proxy is replaced as a original model.

Finally The Solution is here.
Open>Internet Explorer> click Tools>click Internet Options>click Advanced and check to be sure the SSL and TLS protocols are enabled under the security section.

I have sketch up 2015 on 64 bit windows 7 OS. The problem is when I installed 3skeng it shows an error that sketch up Can not connect to 3skeng server.

If anyone knows why this problem occured. Please give me solution.

I have sketch up 2015 running on windows 7 64bit OS. But when I'm try to install 3Skeng on sketch it shows an error message. Sketchup Cannot connect to 3skeng server.

If anyone knows the solution please help me.