[PDFviewer] Manually copied it, won't run

I tried to install it with TotalCommander and TPOT plugin. Copied the pdfviewer.app folder to Applications folder and rebooted. When I tap on the pdfViewer icon I just get a white screen and after 1 minute it disappears...
I unlocked and jailbreaked with iPlus, therefore BSD and an command shell is automatically installed. So what could be the problem?

Thats a permission issue. By default Total Commander gives the app 0644 permission, so using SSH, you have to change the permission to 0777. The Respring the Springboard and run the app.

Thats it! :)