.net - Windows 8 application works on computer but not on windows tablet -

i having weird problem windows 8 application, coded in vb.net, works fine on computer when install on tablet not work.

here did in visual studio : project -> windows store -> create application packages.

here did on tablet : transfered files created tablet ran powershell , installed application successfully. tried run white square "x" inside of (default application icon) shows , brought start menu.

the application seems running open in task bar. however, does not show in task manager.

i tried running powershell install application on computer , works fine.

to make sure tablet wasn't problem created empty application , worked fine on tablet

i tried proposed here , still doesn't work : http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_store/all-modern-apps-fail-to-start-after-windows-81/a80793c7-c214-43ec-9ca9-5c758f9ad840

any ideas causing problem ? can't seem find fix it

this windows tablet : dell venue 11 pro (5130)

additional information

there no code in form_load event of main page

there no error message or exceptions.there redirect start menu if application minimized

i unsure of caused problem. changes configs did along way , forgot about

the solution specific problem :

-start new project , include files previous project.

-create new service reference.

-give permissions appmanifest in previous project

everything seems work fine on tablet.

if ever goes through recommand including previous project piece piece , testing if works each time. if there problem 1 of pages/class/etc know part of program causing problem