my first gtkmm program.. jam when click update

[yahyai-0]

hello there

This is the first time that i programed with c++ and gtkmm on linux. I made a small app.
Its job is like a mini updatemanger

202761

But when I click "Update" the program jam for a while, then it return with updates!!

Here is the source code for the program 202760

thanks in advance!