executable file not working

[duma]

So i have finally finished creating my gui in Qt and finished writing all the code. But when i run the executable, the gui application pops up, but nothing is working in the window i.e. the pushbuttons don't function, the combo boxes have no items etc. It seems like none of the code is executing.
How ever when click build and run in Qt Creator, everything works fine.
And when i run the executable in terminal, it works fine.
I'm not sure what is wrong. any help would be appreciated.